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 not having Huntington's disease (h) is recessive to the allele for having Huntington's disease (H).
This Punnett square shows a cross between two humans.
What is the probability that a human produced by this cross will have Huntington's disease?
A. 4/4
B. 3/4
C. 1/4
D. 2/4
E. 0/4
Select the correct answer from the provided options and reply with the letter associated with it.

E