Which Is of the Following Statements Is True About Sex-Linked

Which is of the following statements is true about sex-linked traits?

A) Females are hemizygous for any gene on the Y chromosome.
B) X-linked recessive genes are always expressed when present in females.
C) In general, females are affected by X-linked recessive disorders far more frequently than males.
D) Fathers do not donate their X chromosome to their sons.
E) If the mother is heterozygous for an X-linked recessive allele, all of her sons will be affected.