Context: In a group of pea plants, some individuals have a tall stem and others have a short stem. In this group, the gene for the stem height trait has two alleles. The allele for a tall stem (H) is dominant over the allele for a short stem (h).
This Punnett square shows a cross between two pea plants.
What is the probability that a pea plant produced by this cross will be heterozygous for the stem height gene?
A. 2/4
B. 1/4
C. 3/4
D. 0/4
E. 4/4
Select the correct answer from the provided options and reply with the letter associated with it.

A