The Average Rate of Erosion on the Moon Is Far

The average rate of erosion on the Moon is far less than on Earth because

A) the Moon is much younger than the Earth.
B) the Moon lacks wind, water, and an atmosphere.
C) the Moon's mare long ago dried up, so there is no more wave erosion there.
D) the Moon's magnetic field protects it from the solar wind better than ours does.
E) the crust of the Moon is much denser than the Earth's crust.