What is the engine oil dipstick used for?

What is the engine oil dipstick used for?
A)To check the oil temperature.
B)To check the oil pressure.
C)To check the oil level.Correct
The engine oil level shall be checked in the sump periodically using the dipstick located in the engine. The measurement will be made with the engine cold and the vehicle in a horizontal position. The oil level mark must be between the minimum and maximum, indicated on the dipstick. It must be refilled to the correct level marked on the dipstick.