Implications in an essay means what can be drawn from that essay...what was is basically about.
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.
D, Ted was trying to inform Jim about a lunch outing.
