阅读下面材料，然后从各题所给的四个选项中选出一个最佳选项。Cats or Dogs? Both cats and dogs are popular pets. Most families, however, can keep only one pet. It can be hard to decide whether to take a cat or a dog into your home. Here, some middle school students are having a cats VS. dogs debate（辩论）.
Group A：Donna Walker
We think cats are better for most families. Many people want to keep a pet, but they live a busy life. Cats don't have to be taken outside to use the bathroom. Instead, they just use a litter box. Their owners only need to keep the litter box clean. They don't need to worry if they are away at work for most of the day. They never have to run home from work early in order to walk their pet.
Group B：Gary Hall
No, dogs are better. Just think about why you want to keep a pet. Dogs can bring you lots of happiness. When you go back home from school or work, your dog will always greet you at the door with excitement. Cats... huh... When you walk into the room, never expect your cat to be too excited about seeing you. What's the point in keeping such a pet？
Group A：Brian Ross
Well, cats seem to have their own timetables, but when they do look for love, they will do their best. Moreover, cats usually live longer than dogs. Most cats can live up to 15 years while most dogs only have 13 years on the planet. Isn't it nice to be able to spend more time with your pet?
Group B：Annie Miller
But dogs are more faithful. A dog never leaves its owner no matter what happens. Dogs also keep you safe. If a bad guy tries to break into your home, your dog will drive him away with loud barks.
Group A：Paula Lee
Yeah, dogs make so much noise! Some dogs bark at almost every stranger, but are there so many bad guys? Cats, however, are quiet most of the time.
Group B：Eric Bell
Dogs can be trained well. Cats have claws(爪子)and they are interested in everything. They can cause much more trouble!
