Select the correct answer. The graph shows the percentage of dog breeds affected by elbow dysplasia, which causes dogs to limp. What’s the most likely explanation for the mixed breed’s disease incidence?

A. It has low diversity in its genes.
B. It has high diversity in its genes.
C. It’s good at saving human lives.
D. It doesn’t suffer attacks from wild predators.
E. It lives comfortably with people.