Context: This passage describes the Huntington's disease trait in humans:
Huntington's disease is a condition that causes the death of brain cells over time. This loss of cells interferes with brain function and may lead to uncontrolled movements, difficulty thinking, and changes in behavior.
In a group of humans, some individuals have Huntington's disease and others do not. In this group, the gene for the Huntington's disease trait has two alleles. The allele for having Huntington's disease (H) is dominant over the allele for not having Huntington's disease (h).
This Punnett square shows a cross between two humans.
What is the expected ratio of offspring that have Huntington's disease to offspring that do not have Huntington's disease? Choose the most likely ratio.
A. 2:2
B. 1:3
C. 0:4
D. 4:0
E. 3:1
Determine the correct option from the provided choices and reply with its corresponding letter.

D