I'm taking a test and have to guess the right answer to the question after the article. Article: Mr. Smith has two cats. One is big and the other is small. He likes them very much. One day his good friend Mr. White comes to see him. He is very surprised .He finds there are two holes in the door, a big hole and a small hole. He says, "My dear friend, why are there two holes in your door?" "To let them in and out." Mr. Black answers. "But why are there two holes?" his friend asks, "How can the big cat go through the small hole?" Question: Mr. Smith has _ . Options: A: two small cats B: two big cats C: a big cat and a small one D: a cat and a bird
C