Read the excerpt from "Healthy Eating." Read the paragraph.

When people adopt pets, they often choose a puppy or a kitten. But people should give more serious consideration to adopting an older animal. Older dogs and cats make wonderful, loyal companions. Some people do not want to adopt an older animal, because they think they are too stuck in their ways and may have bad habits. This is often untrue. Older animals usually require much less training than younger ones. My neighbor, Mrs. Hendricks, said, "Older pets are already house trained, they are less likely to destroy items within the home, and many of them know basic commands." So the next time you visit the pet shelter looking for a new member of your family, think seriously about adopting an older animal. It just might be the perfect pet.

What would make the author's argument more effective?

offering a reason to support her opinion
providing a quotation from a credible source
recognizing and refuting a counterclaim
motivating readers with a call to action