Which of the Following Statements Is True Regarding the Action

Which of the following statements is true regarding the action potentials?

A) As an impulse travels along an axon, the movement of ions changes the charge from positive to neutral in successive sections of the axon.
B) An action potential moves from one end of an axon to the other like a flame moving along a fuse.
C) After an impulse has passed through a particular section of an axon, negative ions are pumped out of that section, and its charge returns to positive while an action potential continues to move along the axon.
D) Just after an action potential has passed through a section of an axon, a neuron can fire again immediately if it receives enough stimulation.