12: Suppose the Earth could be crushed down into a much smaller ball, perhaps 100 km across (and thus of extraordinarily high density). Then: A. the Moon's orbit would become unstable, and we are unable to predict in detail what would happen B. the Moon would feel a much-reduced gravitational effect, and would probably escape into space C. the Moon would continue to orbit just as before D. the Moon would slowly spiral in towards the Earth, pulled in by the enhanced gravity of the now much denser body of the Earth