Myelin Speeds the Conduction of Action Potentials Along a Neuron

Myelin speeds the conduction of action potentials along a neuron by

A) increasing the diameter of the axon.
B) inserting additional voltage- gated K+ channels into the membrane.
C) increasing the resting membrane potential.
D) allowing the action potential to "jump" over sections of the axon.
E) lowering the threshold at which action potentials are generated.