Dextral (D) and Sinistral (D) Shell Coiling in the Water

Multiple Choice

Dextral (D) and sinistral (d) shell coiling in the water snail Limnaea peregra is genetically determined. From a population of mixed sinistral and dextral snails, a sinistral female and a dextral male are chosen. All the offspring are dextral. When the female offspring are mated, 50% produce only sinistral snails and the other 50% produce only dextral snails.
-What were the genotypes of the sinistral female and dextral male that were initially chosen?

A) dd female and Dd male
B) Dd female and dd male
C) dd female and DD male
D) DD female and dd male
E) Dd female and Dd male