In the Great Australian Desert, Rainfall Averages About 30 Centimetres

In the Great Australian Desert, rainfall averages about 30 centimetres per year. Yet, it is not uncommon when hiking in this extremely arid zone to encounter mosses and ferns. One such plant is called "flower of stone". It is not a flowering plant, nor does it produce seeds. Under arid conditions, its leaflike structures curl up. However, when it rains, it unfurls its leaves, which form a bright green rosette on the desert floor. Consequently, it is sometimes called the "resurrection plant". At first glance, it could be a fern, a true moss, or a spike moss.
-What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts?

A) flagellated sperm
B) lack of vascular tissues
C) lack of true roots
D) lack of cuticle