The answer here would be answer choice C. When reading this statement out loud, one can tell that there is a "gap" at the beginning between "he" and "is". It starts up an entirely new statement without any punctuation, so we can tell that this is the only place that our semicolon deserves to go.
Aggression. Hard civility is often aggressing and the action of sneering is also.
What sentence? there's compound sentence, and complex sentence