What is the role of sodium ions and voltage-gated sodium ion channels in the action potential as it relates to changes in the neuron's potential?

A) Sodium ions and voltage-gated sodium ion channels play a crucial role in generating and propagating the action potential in neurons.
B) Sodium ions and voltage-gated sodium ion channels have no impact on the action potential in neurons.
C) Sodium ions and voltage-gated sodium ion channels only affect the action potential in certain types of neurons.
D) Sodium ions and voltage-gated sodium ion channels are only involved in the action potential when the neuron is at rest.