Which Statement Would the Nursing Supervisor Evaluate as Indicating That

Which statement would the nursing supervisor evaluate as indicating that a new cardiac nurse understands the fluxes associated with cardiac action potentials?
A) "Phase 4 is the time in which the cells rest."
B) "Depolarization occurs during phase 1."
C) "The inside of the plasma membrane becomes negative during phase 1."
D) "Repolarization occurs during phase 4."