Context: In a group of budgerigar parakeets, some individuals have green body feathers and others have blue body feathers. In this group, the gene for the body feather color trait has two alleles. The allele for blue body feathers (b) is recessive to the allele for green body feathers (B).
This Punnett square shows a cross between two budgerigar parakeets.
What is the probability that a budgerigar parakeet produced by this cross will be heterozygous for the body feather color gene?
A. 0/4
B. 2/4
C. 3/4
D. 1/4
E. 4/4
From the given choices, select the correct answer and reply with the letter of the chosen option.

A