(A) A meteorite that strikes exactly the same spot as an earlier meteorite will obliterate all traces of the earlier impact.
- will affect stable and non-stable regions
(B) Rates of destructive geophysical processes within any given region vary markedly throughout geological time.
- where does geological time come into picture
(C) The rate at which the Earth is struck by meteorites has greatly increased in geologically recent times.
- same as above
(D) Actual meteorite impacts have been scattered fairly evenly over the Earth’s surface in the course of Earth’s geological history.
Only when the impacts have been scattered evenly, can such comparisons be made, and hence
conclusion drawn that the " lower rates of destructive geophysical processes in those regions" is
a reason for higher density
Hence D seems to be correct
(E) The Earth’s geologically stable regions have been studied more intensively by geologists than have its less stable regions.
- "Impact craters caused by meteorites smashing into Earth have been found all around the globe,"...
implies all regions have been surveyed and "but they have been found in the greatest density in geologically stable regions.." means they have been compared.