During parent-teacher conferences, the principal told Jane’s parents that she was an energetic young lady but that her enthusiasm could lead her to be disruptive to the other children. First of all, since it says "an," it means that the adjective after it has to start with a vowel, so "dull" is incorrect. Aggressive doesn't make any sense, so that is incorrect either. Active is okay, but a better answer is energetic because if you have too much energy and aren't allowed to act on it, you might become disruptive.
