GRE Reading Comprehension: ETS-GRE阅读ETS - G80N82O62VPPK1SU7

According to the passage, the dimorphic wing structure of the summer generation of water bugs occurs because A. the overwintering generation forms two sets of eggs, one exposed to the colder temperatures of winter and one exposed only to the warmer temperatures of spring B. the eggs that produce micropterous and macropterous adults are morphologically different C. water bugs respond to seasonal changes by making an acclimatory functional adjustment in the wings D. water bugs hatching in the spring live out their life spans in ponds and never need to fly E. the overwintering generation, which produces eggs developing into the dimorphic generation, spends the winter in the forest and the spring in small ponds