Need expert help wiht this tough CR

voodoo_child wrote:Although the geological record contains some hints of
major meteor impacts preceding mass extinctions, there were many extinctions
that did not follow any known major meteor impacts. Likewise, there are many
records of major meteor impacts that do not seem to have been followed by mass
extinctions. thus the geological record suggests that there is no consistent
causal link between major meteor impacts and mass extinctions.

Which one of the following assumptiosn enables the argument's conclusion to be
properly inferred?

A. If there were a consistent causal link between major meteor impacts and mass
extinctions, then all major meteor impacts would be followed by mass
extinctions.

B. Major meteor impacts and mass extinctions cannot be consistently causally
linked unless many mass extinctions have followed major meteor impacts.

C. Of the mass extinctions that did not follow any known major meteor impacts,
few if any followed major meteor impacts of which the geological record contains
no hints.

D. If there is no consitent causal link between major meteor impacts and mass
extinctions, then not all mass extinctions could have followed major meteor
impacts.

E. There could be a consistent causal link between major meteor impacts and mass
extinctions even if not every major meteor impact has been followed by a mass
extinction.

OA A

Thanks