Question 8- Answer A

The prompt for this question includes the phrase "violence is an extreme form of aggression". Answer A, which the video says is an incorrect answer, says that "Not all violence is aggression". The video says that this inference must be true. However, there is nothing in the prompt that indicates that there are any other forms of aggression. You could interpret "extreme" to mean that there are other forms, but there's no other information in the prompt to indicate that this is the case (no definitions, etc). It might be the case that violence is the *only* form of aggression. That this possibility is left open means that could be the case that "not all violence is aggression" is false. Am I misunderstanding this, or is there a hidden implication that extreme means "elevated in contrast to lesser alternatives"?