Some gulls prey on surfacing whales, and the number of whales that have lesions from gulls has increased from 2% in the 1970s to 99% by 2011, indicating that
A) the gull population increased.
B) the whale population decreased.
C) a genetic change in gulls led to their preying behavior.
D) preying on whales is a learned behavior in gulls.
Correct Answer:
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