Read the following passage:
"Cat owners hold several truths to be self-evident: that cats are better than dogs; that cat people are better than dog people; that life is incomplete without at least one feline companion. However, not all cat owners agree whether their cats belong indoors or outdoors.
"Indoor advocates point out that cats lead longer and more comfortable lives when they aren’t exposed to all the predators, poisons, diseases, fights, and accidents that lurk outside. Their owners are happier too, because they don’t have to worry about their pets’ safety, or put up with the animals bringing fleas and mangled birds and rodents into the home. In addition, outdoor cats do significant damage to the environment. Free-roaming felines kill billions of songbirds every year and have even caused the extinction of dozens of small mammal species.
"On the other hand, owners who support letting their pets outside say it is cruel to interfere with a cat’s instinctive desire to hunt and roam. They claim that a house-bound lifestyle is actually less healthy because the animals grow bored and fat. These owners also say that anyone who truly loves their pet should be happy to accept some worry and mess in exchange for seeing it live a happier, more natural life. While the outdoor faction acknowledges that their cats kill wildlife, they point out that the toll includes pests like rats and mice, which damage crops, attack other animals, and spread human diseases."
What is the organizational structure of this comparison, and how can you tell?
subject-by-subject; the entire reading is about indoor and outdoor cat subjects
point-by-point; the author makes all the points about inside cats and then makes all their points about outside cats
point-by-point; each point of comparison, like cat health and animal attacks, is given the same amount of discussion
subject-by-subject; the subjects - indoor cats and outdoor cats - are covered one at a time