Moon Rocks Contain No Water in Their Crystal Structure and Contain

Moon rocks contain no water in their crystal structure and contain far less volatile material than those on Earth. Which theory of the origin of the Moon provides the most likely explanation for these differences?

A) formation of Earth and the Moon at about the same time from the preplanetary nebula. The gravity of this proto-moon was insufficient to hold water and lighter volatile materials.
B) collision of a large meteoroid with Earth and the ejection of very hot material, depleted in volatiles, into orbit around Earth
C) breaking away by tidal stress of material depleted in volatiles from Earth's surface
D) capture theory, in which an object with different chemical composition was captured by Earth's gravity from outer space