Assume that in cats, a crooked tail is caused by an autosomal recessive allele. A male and female cat, each with normal tails, have previously had a litter of kittens in which some kittens had crooked tails. What is the probability that the same two parents will next produce two normal females or two males with crooked tails?

a. 5/8

b. 9/16

c. 9/32

d. 9/64

e. 5/32