What Event Occurs to Return a Cell to Its Resting

What event occurs to return a cell to its resting potential?

A) K⁺ rushes into the cell.
B) Na⁺ rushes into the cell.
C) Na⁺-K⁺ pumps move Na⁺ and K⁺ out of the cell.
D) Na⁺-K⁺ pumps move Na⁺ out of the cell and K⁺ into the cell.