All of these will produce genetic change within a population except - A random reproduction

B natural selection

C chromosomal mutations

D genetic drift

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

[content deleted] - user123802726recklesschicken

i think the answer is b.