Fruit Flies (Drosophila Melanogaster) That Had Been Forced to Use

Fruit flies (Drosophila melanogaster) that had been forced to use their ability to learn, i.e., that had been selected for generations for their learning ability

A) had fewer offspring than flies that had not undergone selection.
B) had the same number of offspring as flies that had not undergone selection.
C) had more offspring than flies that had not undergone selection.
D) had varying numbers of offspring. There was no consistent effect.