PT 60 S3 Q19

   Ecologist: One theory attributes the ability of seabutterflies ... ...

The reasoning in the ecologist's argument is flawed in that the argument
(A) presumes, without providing justification, that the two theories are incompatible with each other
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-B, June '10 LSAT (PT 60 Sec. 3)