1. The correct connective is A. Of course. The other options don't make much sense, because you need to show that the opposite from what the narrator said is also possible, and A is the only option that shows such a connection. 2. Plagiarism is A. borrowing without giving the original author credit. This can be quite a problem when people don't credit other people for their work, because they can sue them afterwards. So it is always easier to just write down where you took a piece of information from.
