If you were writing a research paper about pet cloning, which one of these sentences from the passage would be irrelevant to your research?

Anything of the given sentences that doesn't show anything to the reader about the idea or relation of per cloning. Let's say there were examples and the wrong answer could be pets shouldn't be cloned or something like that. It shouldn't be an opinion and it should be focused very clearly and detailed on that alone, pet is different from pet cloning.