原题
录音 1
In the early 20th century, what happened to the wolves in Yellowstone National Park?
ATheir population increased dramatically when their prey population increased.
BThey became a government-protected species.
CThey were eliminated over farming and safety concerns.
DTheir population decreased significantly because of disease.
正确答案：C
解题思路
老师暂未填写解题思路。