If a Woman Is a Carrier for the Color-Blind Recessive

Multiple Choice

If a woman is a carrier for the color-blind recessive allele and her husband has normal vision,what are their chances that a son will be color-blind?

A) None,because the father is normal.
B) 50%,since the mother is only a carrier.
C) 100% because the mother has the gene.
D) 25% because the mother is a hybrid.
E) None since the son will also be just a carrier.