Detailed Examination of the Overall Surface of the Moon and of the Rocks

Detailed examination of the overall surface of the Moon and of the rocks brought back by Apollo astronauts reveals that:

A) unlike Earth's rocks, there is no evidence of water locked into crystal structures in lunar rocks, but there are significant quantities of ice in cold lunar polar regions.
B) no water exists in either liquid form or ice now but, like terrestrial rocks, some water is contained within the crystal structure of lunar rocks.
C) there have been short periods in recent history when water existed on the Moon, during which the rilles or river valleys were formed.
D) water probably existed on the Moon earlier and formed lake beds or maria, but it has evaporated.