Horsehair Worms, in the Phylum Nematomorpha, Do Not Have Any

Horsehair worms, in the phylum Nematomorpha, do not have any respiratory system. They are usually found in puddles of water or on damp sidewalks and patios, or they may come wiggling out of insects. These creatures have no economic importance other than being parasitic to some insects. Based on this scenario, horsehair worms are most likely to:

A) have very thick bodies.
B) have a dry skin surface.
C) use large amounts of energy.
D) have a large surface area compared with their volume.
E) be unable to efficiently digest food.