what tends to increase genetic variation in a population A bottlenecks B disruptive selection C mutation D selective pressures

the best answer u got here is C. mutation

i did the best i can and mark brainliest

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).