题目选项分析

Though subject to the same wild-animal control efforts that killed off almost all the wolves in North America over the past century, the coyote's amazing ability of adapting to the presence of humans has enabled it to expend its range into Alaska and Central America.

Though subject to the same wild-animal control efforts that killed off almost all the wolves in North America over the past century, the coyote, because of its amazing ability to adapt to the presence of humans, has been able to expand its range into Alaska and Central America.