In the high-alcohol environment, individual flies who carried the fast-processing allele had higher fitness than those who did not carry it. What does that mean?
A. Flies with the fast-processing allele were more likely to survive and reproduce than the flies without the allele.
B. Flies with the fast-processing allele required less energy to fly than the flies without the allele.
C. Flies with the fast-processing allele were stronger than the flies without the allele.
D. Flies with the fast-processing allele were less likely to consume alcohol than the flies without the allele.