Every place on Earth receives the same number of hours of sunlight each year—an average of 12 ...

Every place on Earth receives the same number of hours of sunlight each year—an average of 12 hours per day. Why do different areas of the Earth receive different amounts of solar radiation?
A) The height of the place above sea level is an important determinant of the amount of solar energy received.
B) The angle of the sunlight is an important determinant of the amount of solar energy received.
C) The density of the vegetation affects how much solar radiation a place will receive—the more grassland, the less solar radiation.
D) The density of the vegetation affects how much solar radiation a place will receive—the more tall trees, the less solar radiation.
E) Because of the curvature of the Earth, winds of the upper stratosphere can blow solar radiation away from an area before it reaches the ground.