Passage The Aran Islands, a Trio of Carboniferous Limestone Slabs, Likely

Passage
The Aran Islands, a trio of carboniferous limestone slabs, likely more than 350 million years old, are situated at the mouth of Galway Bay off the western coast of Ireland, on what in ages past must have seemed the very periphery of the civilized world.  For those who have dared to test the habitability of these rocky fragments, one certainty has always awaited: challenge.  Indeed, the presumed prototype of the Aran economy has been one of bare subsistence, a veritable experiment in self-sufficiency, demanding resourcefulness, endurance, and, above all, austerity.Of the three isles, Inishmore, the largest and westernmost, whose length forms a 9-mile breakwater against the Atlantic, has perhaps also been the most economically diverse and certainly the most historically colorful.  The island hosted the first monastic communities of Ireland and withstood the blunt force of Viking raiders and, centuries later, Cromwellian soldiers.  Following these invasions, the population-and the economy along with it-managed to flourish despite a landscape whose barrenness offered an almost equal shortage of arable land and surface water.  In addition, Inishmore's prolonged growing season, the result of year-round moderate temperatures, afforded an exquisite irony: the flora and fauna it supported, a curious admixture of that which could be found in alpine, Mediterranean, and arctic climes, were wonders for the naturalist to behold but worthless to inhabitants seeking to sustain themselves on the land's bounty.  Nevertheless, the island has long been able to defy its hardscrabble character and has demonstrated a talent for economic self-reinvention, all the while retaining its image as pristine, primitive, and inhospitable.By the early 19th century, the denizens of Inishmore had learned to effectively counterbalance the meagerness of their island's natural resources by swiftly focusing on new and evermore efficient ways to exploit them.  For example, the abundance of seaweed off its shores supplied a remedy for the scarcity of soil.  Once most of the boulders were cleared away, the sand could be layered with the seaweed, which, as it rotted, transformed the granular matter into fertile earth in which common crops such as barley, rye, oats, and potatoes have since been cultivated.  More land also meant more livestock could be raised, and the grass-fed calves of the island are still prized by mainlanders.  Seaweed could also be harvested by the ton and burnt in kilns to produce kelp, the sale of which on the mainland continues to be a thriving, if seasonal, industry, often more reliable than fishing.This is not, however, to say that life on the Aran isles was ever easy; in fact, the lifestyle of the inhabitants demanded a delicate equilibrium, and in the face of economic marginality most households resorted to occupational plurality-to include any combination of fishing, agriculture, kelp-making, boat-making, fowling, textiles, and manual labor.  Yet, despite this ever-shifting quest for resources, life on Inishmore even in the 1800s was a far cry from that depicted in Robert J. Flaherty's self-styled documentary film of 1934, Man of Aran, which dramatized the islanders' daily existence as a never-ending and desperate struggle against the elements, particularly the constant apocalyptic threat of the sea.Eighty years later, this image of Aran life endures, perpetuating a myth that has arguably become a commodity as real as the Man of Aran sweater sold on Inishmore but typically knit elsewhere in Ireland-a symbol of the island's dual character, of its commercial nature that so patently contradicts its celebrated identity as isolated and self-sufficient.  Still, the persistence of this image of remoteness, exposure, and inexorable hardship, however fabricated or embellished, has helped the island reinvent its economy as one heavily reliant on the outside-particularly on a tourist industry that brings in as many as 2,000 visitors a day by ferry-rather than self-sufficient.
-Based on the passage, the author implies that the inhabitants of Inishmore believed that the sea:

A) was as important as their land.
B) was too unpredictable to be their chief financial resource.
C) was essential for their economic stability.
D) was generally correlated with peril.