Muller's Ratchet Is the Idea That ________ Accumulate in Asexual

Muller's ratchet is the idea that ________ accumulate in asexual populations. In such a situation, sex would be beneficial because ________.

A) deleterious mutations; mutation-free genotypes could form through recombination
B) deleterious mutations; it provides protection against parasitism
C) deleterious mutations; more offspring would be produced and thus some are likely to survive
D) beneficial mutations; it would rapidly bring together beneficial mutations from different individuals
E) beneficial mutations; it would increase genetic diversity