Which evidence of the giant impact theory suggests that Earth and the moon may have once been in the same place?

A: The amount of water on the moon adn Earth is similar.
B: The composition of moons rocks and some Earth rocks are similar.
C: They type of gases in the atmospheres of Earth adn the moon is the same.
D: The temperatures on Earth and on the moon are similar.

B: The composition of moon rocks and some Earth rocks are similar.