Traits Controlled by Sex- Linked Recessive Genes Are Expressed More

Traits controlled by sex- linked recessive genes are expressed more often in males because

A) all male offspring of a female carrier get the gene.
B) the male has only one gene for the trait.
C) males always carry two copies of these genes.
D) males inherit these genes from their fathers more often than their mothers.
E) males get more doses of the recessive gene than do females.