Which of the Following Statements Correctly Describes an Example of Epistasis

Multiple Choice

Which of the following statements correctly describes an example of epistasis?

A) Recessive genotypes for each of two genes (aabb) result in an albino corn snake.
B) In rabbits and many other mammals,one genotype (ee) prevents any fur color from developing.
C) In Drosophila (fruit flies) ,white eyes can be due to a combination of multiple genes.
D) In cacti,there are several genes for the type of spines.