Consider an Action Potential

Consider an action potential. Write the letter (A - E) that corresponds to the best answer.
-______ rising phase

A) voltage-gated potassium channels open, allowing potassium to exit the cell
B) voltage-gated sodium channels open, allowing sodium to enter the cell
C) equilibrium potential of sodium is reached
D) equilibrium potential of potassium is reached
E) voltage-gated channels are closed