Why Is the Energy of the Sun Less Intense at the Poles

Why is the energy of the sun less intense at the poles as compared to the equator?

A) The tilt of the Earth moves the poles farther away from the most intense sunlight.
B) Sunlight is spread wider at the poles and, therefore, less intense.
C) The movement of wind across the face of the Earth pulls cooler air from over the oceans and blows it toward the poles. This cools the poles while leaving the region around the equator hot.
D) The movement of cool waters in ocean currents flows away from the equator and cools the air farther from the equator, causing the polar regions to be cooler than the equatorial region.
E) The Earth shifts in its orbit periodically and at times it moves farther from the sun.