New Alleles That Appear by Mutation

Multiple Choice

New alleles that appear by mutation

A) are inherently disadvantageous to their bearers.
B) are seldom advantageous or disadvantageous in themselves.
C) either have or lack survival value only in the context of their environment.
D) are seldom advantageous or disadvantageous in themselves and either have or lack survival value only in the context of their environment.
E) are inherently disadvantageous to their bearers and are seldom advantageous or disadvantageous in themselves.