Pretty sure you're a person called Dylan
One piece of evidence to support the theory that south America and Africa were once connected; Continental Drift.
No, the answer is C. If it was A and the air cools, then why are deserts hot? The answer is C because as air rises it heats up and lose a its moisture through evaporation, leaving hot dry air for the deserts. This is called the rain shadow effect, where one side of the mountain is moist and cool and the other side is a desert.
