You need to read an editorial and then basically summarize it.
I think that it is c because it seems the only one to be right and if you look at the picture it is obviously right. Hope this helps.
The statement that is true for sentence that have more than one clause is that, there can be one negative word per clause. If a sentence has more than two clauses, then each clause can have one negative word. But double negatives in one clause is grammatically wrong.
