In the final paragraph, the author says many adult dogs spend a lot of time in the pound, and some never find good homes. Based on the passage, why is this most likely?

• A. People do not want to get a dog that does not have much time left to live.
• B. People see adult dogs as unhappy and dangerous, while they see puppies as cute and friendly.
• C. People understand that most adult dogs still need a lot of training before they understand how to behave properly.
• D. People think that puppies are cute and playful and do not always think about how much work it will take to train them.