What difference, if any, would have resulted if the protoplanet that struck Earth had done so before Earth underwent chemical differentiation?
A) There would have been no difference at all.
B) Chemical differentiation would have resulted in the Moon having an overall composition very similar to Earth's.
C) Chemical differentiation would have resulted in the Moon's composition being like the core of Earth.
D) Chemical differentiation would have resulted in the Moon's composition being like the mantle of Earth.
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