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Mammals are animals with hair or fur. They feed their babies milk when they are born. Mammals can live all over the world. Which detail would belong with this passage?
A.) Reptiles like to live all over the world too. B.) Humans, cats, and dolphins are examples of mammals. C.) A cat is a mammal that has babies called kittens.
What is B.) Humans, cats, and dolphins are examples of mammals?