The whole word itself isn't a prefix. But "Pre-" in prepay would be the actual prefix.
A soda ban should be put in place, due to the fact it is the leading cause of obesity in the United States.
(I don't support a soda ban btw)
Answer:
i think option b
but it can be wrong or right you decide it
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.'