Context: In a group of American curl cats, some individuals have curled ears and others have straight ears. In this group, the gene for the ear type trait has two alleles. The allele for straight ears (e) is recessive to the allele for curled ears (E).
This Punnett square shows a cross between two American curl cats.
What is the expected ratio of offspring with straight ears to offspring with curled ears? Choose the most likely ratio.
A. 4:0
B. 0:4
C. 2:2
D. 3:1
E. 1:3
Identify the correct choice from the options below and respond with the letter of the correct option.

A