What Is the Primary Advantage of Having Multiple Mating-Type Alleles

What is the primary advantage of having multiple mating-type alleles?

A) There is an increased probability that two fungi encountering each other will have compatible mating types.
B) More spores can be produced during sexual reproduction.
C) More diversity can be achieved through self-fertilization.
D) There is no need to produce chemical signals to attract a mate.
E) Fungi can more easily switch between sexual and asexual reproduction.