The passage provides the most support for inferring that which one of the ... ...

The passage provides the most support for inferring that which one of the following is true of ancient ponderosa forests?
(A) Ponderosas that thrived in these forests probably differed genetically from modern ponderosas in subtle, though significant, ways.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in PT72 (Jun 2014): Reading Comprehension