Which of these statements best explains the shape of the Earth?
a. Because of its rotation about its axis, Earth has a greater circumference around the equator than around the Prime Meridian.
b. Because of its revolution around the sun, Earth has a greater circumference around the equator than around the Prime Meridian.
c. Because of its rotation about its axis, Earth has a greater circumference around the Prime Meridian than around the equator.
d. Because of its revolution around the sun, Earth has a greater circumference around the Prime Meridian than around the equator.
