Which of the following can be inferred from paragraph 5 about the behavior of male túngara frogs A. When in small choruses they use less effective mating calls to decrease their risk of predation. B. They avoid joining a large chorus in a breeding pool because it increases the risk of predation. C. They avoid the use of the whine-chuck call whenever there is the risk of predators. D. They attempt to avoid predation by making their calls at night.