GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 05AY14XJU2O51NROJ

Which of the following, if true, would most clearly demonstrate the interaction mentioned? A. Female larks respond similarly both to short, simple songs and to longer, more complicated songs. B. Male canaries use visual ornamentation as well as elaborate song repertoires for mate attraction. C. Both male and female blackbirds develop elaborate visual and vocal characteristics. D. Male jays use songs to compete among themselves and to attract females. E. Male robins with elaborate visual ornamentation have as much reproductive success as rivals with elaborate vocal characteristics.