A Woman Has an X-Linked Recessive Trait

A woman has an X-linked recessive trait. What must her mother's genotype be?

A) X^bX^b
B) X^BX^B
C) X^BX^b or X^bX^b
D) X^BX^B or X^bX^b
E) X^BX^B or X^BX^b