Which sentence from the article shows the author's bias?
A. Animal shelters around the country are struggling to deal with a staggering surplus of pets.
B. The puppies ore often poorly housed and don't receive proper medical care.
C. Only a selfish, cold-hearted person would decline to adopt one of them.
D. Many people believe that buying a dog from a breeder or pet store gives you a better chance of ending up with a healthy, compatible pet.