Which of the Following Does Not Support the Hypothesis That

Which of the following does not support the hypothesis that the evolution of parasites and hosts occurs in cycles?

A) When parasites strike the most common genotypes in the population of their hosts, the hosts reproduce less or even die off.
B) When parasites strike the most common genotypes in the population of their hosts, more resistant host genotypes become more common.
C) When host genotypes become more common, the most common parasite is no longer well adapted to the most common host genotype.
D) Parasite genotypes are unable to exploit new host genotypes, so the cycle of parasite-host relationships ends.