What Was One of the Primary Ways the Dutch Republic

What was one of the primary ways the Dutch Republic managed to become the most economically successful during the early seventeenth century?

A) by declaring the Dutch government's independence from Spain
B) by decreasing the number of people whose occupation was domestic service
C) by coming closer to creating a stable currency through the establishment of the Bank of Amsterdam
D) by using only small amounts of energy for agriculture and manufacturing
E) by ending rural development and instead focusing only on urban development