Round Seeds (R) Are Dominant to Wrinkled Seeds (R), and Yellow

Multiple Choice

Round seeds (R) are dominant to wrinkled seeds (r) , and yellow seeds (Y) are dominant to green seeds (y) . A true-breeding pea plant with round and yellow seeds is crossed to a true-breeding plant with wrinkled and green seeds. The F₁ progeny are allowed to self-fertilize.
-What is the probability of obtaining a round, yellow seed in the F₂?

A) 3/4
B) 1/16
C) 9/16
D) 3/16
E) 1/2