The Main Reason Polar Regions Are Cooler Than the Equator

Multiple Choice

The main reason polar regions are cooler than the equator is that

A) there is more ice at the poles.
B) sunlight strikes the poles at a lower angle.
C) the poles are farther from the sun.
D) the polar atmosphere is thinner and contains fewer greenhouse gases.
E) the poles are permanently tilted away from the sun.