Animals with Thin Cuticles Are Generally Restricted to Moist Habitats

Animals with thin cuticles are generally restricted to moist habitats because

A) a thin cuticle allows water to be lost across the body surface.
B) there are fewer predators in these types of habitats.
C) these animals rely on flowing water to bring them food.
D) an animal moving through a moist habitat encounters less friction.
E) moist habitats increase efficiency of the lophophore.