What causes ocean water to be warmer at the equator than farther north?

The answer is A

Explanation:

The entire question is " What causes ocean water to be warmer at the equator than farther north?

a. Sunlight hits directly so the warmth is more concentrated

B. Cold water currents move from the poles to the equator

C. Seasonal winds push warm water away from the coasts

D. Sunlight hits at an angle so the warmth is spread over a wider area"

the atomic mass is the bottom number on the element.

-steel jelly