TOEFL Reading: ETS-TOEFL阅读机经 - L83R361OVL7R81B3L$

It can be inferred paragraph 5 that having species specific songs benefits frogs in which of the following ways? A. It enables frogs to better protect eggs from being damaged by members of other species. B. It make it possible for frogs to judge their distance from potential mates. C. It helps frogs to avoid having offspring that cannot survive and reproduce. D. It makes it possible for frogs to invest more of their energy into producing eggs.