As One Moves Away from the Equator, Average Temperatures Drop

Multiple Choice

As one moves away from the equator, average temperatures drop because:

A) the sunlight strikes Earth's surface at an angle and is therefore less intense.
B) greenhouse gases are concentrated at the equator and become less prevalent the farther one moves away from it.
C) the jet stream provides cooler air currents farther away from the equator.
D) the El Nino effect does not affect equatorial regions.