What happens if a population is in hardy-weinberg equilibrium apex?

I think a relative frequency of alleles or genetic variation will remain unchanged for generations. For example if there is a 1 percent genetic variability in an organism of first generation, then the genetic variability in an organism of second generation will also be approximately 1 percent. There will not be a rapid increase in genetic variations. Mutation will not occur or if occur then it will be at the rate of equilibrium. 

The answer is c) organisms that are sensitive to changes in temperature would die.