Hello!
It is metaphor
This is being compared between something that is not applicable.
It is not simile because it doesn't have the words 'like' or 'as'.
Not a hyperbole since it isn't an exaggeration.
Finally, it is not a personification because it does not compare a human like feature to an inanimate object.
Hope this helps! :D
I would say that the answer is #2
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.'
It's A and C, #platolivesmatter
