The correct answer is: People should react with force against injustice.
In the passage from Jane Eyre which states: “When we are struck at without a reason, we should strike back again very hard. . . . so hard as to teach the person who struck us never to do it again.”, it can be inferred that Bronte thinks that when someone unfairly attacks you or lashes out at you, you should get even by striking back at them very hard in order to teach them a lesson so that they do not ambush or strike back at you again in the future.
