Because there was no previous history of hemophilia in Queen Victoria's family,and because she transmitted the mutant allele to a number of her children,it is reasonable to assume that ____.

A) her father was homozygous for the disorder
B) her mother was homozygous for the disorder
C) her sister was a heterozygous carrier
D) she was homozygous for the disorder
E) she was a heterozygous carrier