In his study of the Mediterranean fruit flies (Ceratitis capitata),Matthew Gage (1991)found that ________.

A) males allowed to mate alone produced 2 1/2 times more sperm than those mating in the presence of other males
B) males allowed to mate alone produced 2 1/2 times less sperm than those mating in the presence of other males
C) males produced the same amount of sperm when they were allowed to mate alone or when they mated in the presence of other males
D) males engaged in aggressive behavior when mating in the presence of other males