Which of the Following Statements About Action Potentials Is TRUE

Which of the following statements about action potentials is TRUE?

A) Partial action potentials result in fewer neurotransmitter molecules being released than whole action potentials.
B) Action potentials operate under the all-or-none law, which means that action potentials either move all sodium ions across the membrane or none of the sodium ions across the membrane.
C) Once an action potential is started, it is self-sustaining and continues to the end of the axon.
D) Action potentials regenerate themselves during their refractory periods when the axon membrane is depolarized.