A Population of Bacteria Is Not in Hardy-Weinberg Equilibrium

A population of bacteria is not in Hardy-Weinberg equilibrium. Through repeated exposure to an antibiotic, the frequency of the recessive allele is rapidly increasing. What is the most likely explanation for this response?

A) The recessive allele is responsible for susceptibility of the bacteria to the antibiotic.
B) The dominant allele is responsible for susceptibility of the bacteria to the antibiotic.
C) The recessive allele is responsible for resistance of the bacteria to the antibiotic.
D) The population is experiencing gene flow.
E) The population is experiencing disruptive selection. The frequency increase in one allele shows a violation of the Hardy-Weinberg equilibrium. Since the recessive allele is increasing in response to antibiotic exposure a selective agent) , this allele must be responsible for an adaptive phenotype, most likely antibiotic resistance.