The Phenotypes of Complex Traits Vary with Both Genotype and Environment

Multiple Choice

The phenotypes of complex traits vary with both genotype and environment. An important implication of this is that:

A) we can't predict the expression of a genotype without knowing its environment.
B) we can't predict how a given environment will affect the expression of a trait without knowing its genotype.
C) no one genotype will produce the "best" phenotype in all environments.
D) several different genotypes may produce equally fit phenotypes in the same environment.
E) All of these choices are correct.