The answer is a. It’s the only one with a control group
Five conditions are required which are 1)there must be random mating,2)the population must be very large,3)there cannot be no movement into our out of the population, 4)no mutations,5)no natural selection.
Bc while asexual reproduction is a copy of your genes and DNA, sexual reproduction involves an infinite amount of combos from your genes and your partner's genes as well.
Evolution maybe?
Hope this helped