Answer:
The options are
A) nonrandom selection.
B) disruptive selection.
C) directional selection.
D) stabilizing selection.
The answer is C)directional selection.
Step-by-step explanation:
Directional selection is a type of natural selection and occurrence in population genetics. It involves a phenotype which is most extreme being chosen over forms of phenotypes. It occurs over a period of time when the allele frequency completely aligns in the pattern of the extreme phenotype.
This explains why the frequency of a previously rare allele becomes more frequent in the population after a certain period of time.