Four friends - A, B, C, and D - have different pets: a dog, a cat, a bird, and a fish. A does not have a dog or a cat. B has a pet that is not a bird. C does not have a fish. Who has the cat?
Assertion (A): All mammals are warm-blooded animals. Reason (R): Warm-blooded animals can regulate their body temperature internally. Which of the following is correct?