Context: In a group of guppies, some individuals have a gray body and others have a golden body. In this group, the gene for the body color trait has two alleles. The allele for a gray body (B) is dominant over the allele for a golden body (b).
This Punnett square shows a cross between two guppies.
What is the probability that a guppy produced by this cross will be heterozygous for the body color gene?
A. 0/4
B. 4/4
C. 2/4
D. 1/4
E. 3/4
Choose the right answer from the options and respond with its letter.

C