Here's a problem to solve: The average rainfall in Nevada is about 7 inches per year. The most likely reason for the low amount of rainfall is the

Among the 4 following options, which is the correct answer?

- A: high elevations of deserts.
 
- B: location north of the equator.
 
- C: lack of moisture in the air.
 
- D: great distance from the ocean.
 