A、Most of them keep more than one pet. B、A lot of them spend a lot on their pets. C、More than half of them have got one dog. D、A

The Humane Society reports that approximately 47% of U. S. households own at least one dog, and when we refer to the dog as man’s best friend, we mean it so sincerely that according to clinical psychologist Dr. Suzanne Phillips. we treat our dogs better than our spouses: " What is interesting in my work with couples is that although couples may disagree on most topics. they usually both soften in tone and manner to agree that the dog, cat, bird, or horse is great. " As much as we love our four-legged, furry friends, they demand a lot of responsibility: they need food, shelter, medical care, and attention, but when they chew holes in our favorite pair of high-heels or toss their biscuits all over the newly-cleaned carpet, we forgive them.
    The reason why we sometimes seem to develop stronger relationships with our dogs than with the humans in our lives is so simple that we easily overlook it. Dogs operate on the Golden Rule: they treat us the way we want to be treated, and we respond in kind.
    No matter what we do, whether it’s coming home late from work, snapping at them for wanting to play fetch when we’d rather watch TV, or boarding them at the vet for two weeks while we go on a family vacation, they still love us. A dog will never turn his back on you, even when every other human in the vicinity declares you to be the most unlikable person they’ve had to deal with all day.
23. What do we know about American families?
24. What does Dr. Suzanne Phillips find interesting?
25. Why do people build a stronger relationship with dogs?