If We Assume That the Average Person Carries One Deleterious

If we assume that the average person carries one deleterious autosomal recessive mutation,what is the risk that the child of an uncle-niece mating will be homozygous for one of the mutations present in the parents of the child's father?

A) 1/64
B) 1/32
C) 1/16
D) 1/11
E) 1/8