A recessive gene located on the X chromosome is the cause of hemophilia in affected individuals. Males are more likely to have hemophilia than females because

A.
females have no copies of the X chromosome.
B.
hemophilia is associated with high testosterone levels.
C.
males have only one copy of the X chromosome.
D.
males have two copies of the X chromosome.

C. males have only one copy of the X chromosome.