What axonal characteristic facilitates the propagation of an action potential along a myelinated axon?

A) Voltage-gated Na+ and K+ channels are concentrated in the myelinated axonal segments.
B) Voltage-gated Na+ and K+ channels are concentrated in the unmyelinated axonal segments.
C) Voltage-gated Na+ channels are concentrated in the myelinated axonal segments; voltage-gated K+ channels are concentrated in the unmyelinated axonal segments.
D) Voltage-gated K+ channels are concentrated in the myelinated axonal segments; voltage-gated Na+ channels are concentrated in the unmyelinated axonal segments.
E) Voltage-gated Na+ K+ channels are spread evenly throughout both myelinated and unmyelinated segments.