The Role of ATP in the Sodium-Potassium Pump Is To

The role of ATP in the sodium-potassium pump is to:

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