Context: This passage describes the myotonia congenita trait in goats:
Myotonia congenita is a condition that causes temporary muscle stiffness. When goats with myotonia congenita attempt to run from a resting position, their leg muscles often stiffen, causing them to fall over. Because of this behavior, these goats are referred to as fainting goats. Myotonia congenita is also found in other mammals, including horses, cats, and humans.
In a group of goats, some individuals have myotonia congenita and others do not. In this group, the gene for the myotonia congenita trait has two alleles. The allele for not having myotonia congenita (m) is recessive to the allele for having myotonia congenita (M).
This Punnett square shows a cross between two goats.
What is the expected ratio of offspring that have myotonia congenita to offspring that do not have myotonia congenita? Choose the most likely ratio.
A. 3:1
B. 4:0
C. 2:2
D. 0:4
E. 1:3
Select the correct answer from the provided options and reply with the letter associated with it.

C