Biology Forums - Study Force

The most popular theory for the origin of the moon today is ________.
 
  A) the early Earth and a planet the size of Mars collided, and the ejected material coalesced to form the earth's moon.
  B) the earth captured a small planet, which is our moon.
  C) the moon and Earth coalesced from an eddy in the solar nebular, forming a binary planet system.
  D) the moon was formed when Mars and a comparable size planet collided, and the moon was ejected toward Earth and captured.

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