Genes Are Responsible for the Expression of Most Human Traits

Multiple Choice

Genes are responsible for the expression of most human traits. However, if we see a particular trait (e.g., hair colour) we cannot be certain that it is due to genes. Why?

A) Traits are not inherited.
B) Genotype is not equal to phenotype.
C) Natural selection always alters the genotype.
D) Social Darwinism can come into play.
E) Genetic determinism is weak.