【正确答案】 A

【答案解析】
[听力原文] Questions <11>-<13>
Deer are confirmed vegetarians. But you would never know it by watching the white-tailed deer an island in Lake Michigan each spring. In the first documented case Of its kind, two wildlife biologists, writing in a journal, report that deer have been gulping down a kind of small fish, which die off each spring and summer, washed up on the beach.
It is reported that the average deer ate 235 fish during each of three daily trips to the beach.
The white-tailed deer were introduced to an island in late 1926. The first fish die-offs began in the late fifties. Deer have never been known to eat meat on a regular basis, although occasional occurrences have been reported. Someone once spotted a deer eating a dead salmon. It is also presumed that deer eat bird, but don't get the opportunity to do it very often.