Context: In a group of rats, some individuals have a normal-sized body and others have a dwarf body. In this group, the gene for the body size trait has two alleles. The allele for a dwarf body (b) is recessive to the allele for a normal-sized body (B).
This Punnett square shows a cross between two rats.
What is the expected ratio of offspring with a dwarf body to offspring with a normal-sized body? Choose the most likely ratio.
A. 2:2
B. 4:0
C. 1:3
D. 0:4
E. 3:1
Identify the correct option from the choices provided and respond with the letter of the correct option.

A