Answer:
D. but it is a poor question.
Step-by-step explanation:
Like all questions like this, if you are writing an essay you could justify more than 1 answer.
It could be that she's wrecking havoc on an army that has battered her family. Then A would be a possible answer.
It could be that seeking revenge has forced her to think deeply about how to bring that about. Then B could be an answer.
It could be that she puts everything she knows in service to getting revenge. C therefore is possible.
I think however that you are intended to pick D. She should be content with victory. If she extends it to revenge, it becomes a flaw. It doesn't mean the other answers aren't true. It just means that should be a prudent leader that knows she must live to fight another day. D.
But it is a very poor question.