PT 61 S4 Q23

   Columnist: Although much has been learned, we are stilllargely ... ...

Which one of the following principles, if valid, most helps to justify the columnist's argument?
(A) It is strongly in our interest to preserve certain plant and animal species.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Complete Section: LR-B, Oct. '10 LSAT (PT 61 Sec. 4)