The answer is C) An explanation is informative, while an argument is persuasive. When someone is explaining something to you, they are giving you facts. They are trying to teach you with facts, not opinions. On the other hand, an argument is persuasive. They are trying to get you to take their side. It is not fact, it is opinion. Your answer is C.
~Deceptiøn
If you are telling us to revise the sentence, one error is that there is a double negative. 'not' and 'un' would cancel each other, and the revised sentence 'I wouldn't say he's the nicest guy around, but I've seen him behave kindly before.'
