According to the passage, the generation of water bugs hatching during the summer is likely to A. be made up of equal numbers of macropterous and micropterous individuals B. lay its eggs during the winter in order to expose them to cold C. show a marked inability to fly from one pond to another D. exhibit genetically determined differences in wing form from the early spring-hatched generation E. contain a much greater proportion of macropterous water bugs than the early spring-hatched generation