The Role of ATP in the Sodium-Potassium Pump Is

The role of ATP in the sodium-potassium pump is

A) to transfer Na⁺ to the inside of a cell.
B) to assist a Na⁺ to bind to a carbohydrate.
C) to transfer Na⁺ to the outside of a cell.
D) to assist a cell to release Na⁺ by exocytosis.
E) to assist a cell to take up Na⁺ by endocytosis.