One theory of the Moon's origin is that the Earth, early in its development, was a rapidly rotating body of molten rock in which most of the iron had settled to the core; some of this fluid was cast off from the surface of the spinning mass and later solidified to form the Moon.

Which of the following conclusions can best be supported by the theory above of the Moon's origin, if that theory is correct?

(A) The Moon is the only sizable heavenly body in orbit around the Earth.

The size of the moon does not help us

(B) The Moon has proportionally less iron at its core than the Earth does.

If the moon has proportionally less iron just the matter to form it our theory is backed up because more iron could mean that the moon did form from another source than the Earth

(C) The surface of the Moon solidified after the surface of the Earth did.

We already know this from the last part of the stimulus

(D) Most of the fluid cast off from the Earth was dispersed into outer space.

Irrelevant

(E) The Moon, like the Earth, has a solid surface and a molten core.

Irrelevant.