According to Hardy-Weinberg law, the frequencies of alleles and genotypes remain constant ina population across generations when

Explanation

The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences. These influences include mutation, migration, genetic drift, and natural selection. Only random mating, which does not change allele frequencies, maintains Hardy-Weinberg equilibrium. Thus, option C is correct because random mating keeps the population in equilibrium by ensuring that allele frequencies remain constant. Other options involve mechanisms that alter allele frequencies, violating the conditions of Hardy-Weinberg equilibrium.