Score Plus

Above reasoning is absolutely correct. Thanks!

Also, I'd like to mention something here, if we take a closer look at the sentence, it compares density, which is expressed as count per unit square, with density in the latter part of the sentence.

A wild life expert predicts that the reintroduction of the caribou into the nothern Minnesota would fail if the density of the timber wolf population in that region is more numerous than one wolf for every 39 square miles

This reasoning can also help us in eliminating some of the answer choices.