On June 21, why is there greater solar energy at the North Pole than the Equator?

A- The North Pole is closer to the Sun than the Equator on that date.
B- The Sun hits the North Pole more directly on that date.
C- Although the solar intensity at the North Pole is less than at the Equator, there are many more hours of daylight.
D- The hole in the ozone layer allows more sunlight to reach the North Pole in the summer.