Passage Summary: A dog owner argues that if you live in an apartment and don't have much time to walk a dog, you should get a big one because they need less exercise to stay well-behaved compared to small dogs.

Conclusion: For apartment dwellers with limited time, a large dog is less likely to be troublesome than a small dog.

Reasoning: Large dogs require less intense exercise to stay fit than small dogs, and dogs that do not receive their required level of exercise are more likely to be troublesome.

Analysis: The argument relies on a significant gap between the general needs of dogs and the specific constraints of an apartment dweller. It assumes that the 'limited time' available is actually sufficient to meet a large dog's exercise needs, even if it isn't enough for a small one. We also have to assume there aren't other reasons why a large dog might be more 'troublesome' in a small apartment that would outweigh the exercise benefits. Look for an answer that ensures the exercise requirements of large dogs actually fit within the time constraints mentioned.