Which of the Following Statements About Our Moon Is FALSE

Which of the following statements about our Moon is FALSE?

A) its average density is less than that of the Earth (it seems to have fewer heavy materials)
B) most of what we know about its geology is the result of the Apollo landings
C) on Earth, we can see all its sides in the course of a month as it goes around us
D) its mass is less than that of the Earth
E) it has no real atmosphere to speak of