Although There Is a Strong Genetic Component to Hip Dysplasia

Although there is a strong genetic component to hip dysplasia in dogs, new research suggests that environment also plays a role. Environmental factors that influence the development of hip dysplasia include such things as overweight condition, injury at a young age, or repetitive motion on the forming joint (e.g., jogging with a puppy under the age of one year) . Based on this, which of the following is true about this disease?

A) This disease has evolved with the different dog populations.
B) This disease is both acquired and inherited.
C) This disease occurs due to mating individuals of different species.
D) This disease is a result of natural selection.