【单选题】Visiting a National Park can be relaxing, inspiring and rejuvenating, but it can also be disturbing. As you drive into Rocky Mountain National Park, and you will see starving elk, damaged meadows and ...
A.
caused the near extinction of the endangered animals.
B.
intervened the natural process.
C.
made the visit of National Parks relaxing, and inspiring and rejuvenating.
D.
saved the elks in the Rocky Mountain Park from starvation.