I'd say C, Illegal, Unlawful. They are both wrong, and illegal basically means against the law, therefore, they are the same. I hope this helps!
It is called an adverb. I hope this helps. :)
I would choose A and B because you need and main idea about the product and you also need a major detail about the product. I am not sure I just says what I think it is important. Like if it help
