PT 61 S2 Q18

To find out how barn owls learn how to determine thedirection from which ... ...

The scientists' reasoning is vulnerable to which one of the following criticisms?
(A) It fails to consider whether the owls' vision was permanently impaired by their having worn the lenses while immature.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-A, Oct. '10 LSAT (PT 61 Sec. 2)