PT 58 S1 Q24

The Kiffer Forest Preserve, in the northernmost part ofthe Abbimac Valley, ... ...

Which one of the following, if true, most undermines the argument?
(A) Most of the increase in the preserve’s bear population over the past eight years is due to migration.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, Sept. '09 LSAT (PT 58 Sec. 1)