Select the correct answer.
Brandon works on a livestock farm. Each day, he takes his sheep grazing in the mountains. He feels the air getting cooler as he climbs to the top of the mountain. What is the best explanation for why the air gets cooler near the top?
A.
The amount of sunlight decreases near the mountaintop.
B.
The amount of heat radiated from Earth’s surface decreases with elevation.
C.
Cool air masses rise as they approach the base of the mountain.
D.
There is a large body of water at the top of the mountain.