Describe a Capillary

Describe a capillary.

A) A capillary is a large blood vessel whose thick wall consists of a thick tunica media with diffuse elastic fibers.
B) A capillary is a large blood vessel whose thick wall consists of a thick tunica media with few elastic fibers.
C) A capillary is a large blood vessel whose wall is thin but all three layers are present.
D) A capillary is a small blood vessel whose thin wall permits exchange between blood and interstitial fluid by diffusion.
E) A capillary is a medium-sized blood vessel that has a poorly defined tunica externa,and the tunica media has only a few layers of smooth muscle cells.