Which one of the following most accurately expresses the main point of ... ...

Which one of the following most accurately expresses the main point of the passage? .
(A)  Calvaria major germination, though rare,
 is probably adequate to avoid extinction of the species.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in June 2013 LSAT (PT 69): Reading Comprehension