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 animals make loyal pets, and they often require much less training. According to the National Humane Society, older pets are already house trained, they are less likely to destroy items within the home, and many of them know basic commands. Veterinarian Dr. Maria Hendricks agrees. "Older pets often make better companions than younger ones," she said, "because they are often much more calm and obedient." 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?

developing a clear and reasonable claim
recognizing and refuting a counterclaim
motivating readers with a call to action
providing evidence from a reliable source