Well I don't see any options so my guess would be:
Don't pick any opinions because if your writing a research paper then you should have your paper based off of facts and things you have seen off of the internet.
The pet cloning controversy. If you were writing paper about pet cloning, which one of these sentences from the passage would be irrelevant and NOT supported by research
Early in his reign, he was very brutal and felt quite guilty of how he behaved. He became a Buddhist, and practiced ahimsa (not hurting other living things).