Which of the following is a challenge to the hypothesis that bats, which produce an unusually large number of sperm, increase the probability of conception when females engage in multiple matings?
I) Female bats can eject the sperm of certain males after mating.
II) A female can actively choose which male mates with her last, thus increasing the odds of conception with that male's sperm.
A) Only I is correct.
B) Only II is correct.
C) Both I and II are correct.
Answer: C
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