Ecologist: We do not know how many species are facing extinction, because so many species are undiscovered. If the members of these undiscovered species were plentiful and widespread, they would most likely already have been discovered. And the best predictor of high extinction risk for a species is low numbers coupled with limited habitat. Thus it stands to reason that _____________.
Which of the following most logically completes the argument above?

Question

Examsnet · Accepted Answer

Correct Answer is :  many undiscovered species are likely to face a high risk of extinction

GMAT Verbal Reasoning Practice Test 7