A couple has three children, all of whom have brown eyes and blond hair. Both parents are homozygous for brown eyes (BB), but one is a blond (rr) and the other is a redhead (Rr). What is the probability that their next child will be a brown eyed redhead?
a. 1/16
b. 1/8
c. 1/4
d. 1/2
e. 1
Answer: D