47. Which combination of axon features should lead an axon to communicate with downstream cells most slowly?
(A)An axon that is long, wide, and myelinated.
(B)An axon that is long, thin, and nonmyelinated.
(C)An axon that is short, wide, and myelinated.
(D) An axon that is short, thin, and myelinated.
(E)An axon that is short, thin, and nonmyelinated.