Which of the Following Is the Best Example of an Unjust

Which of the following is the best example of an unjust harm, as Broome understands that idea?

A) Jack and Jill are playing catch with a baseball. Jack accidentally throws the ball too hard and it breaks a large window in a neighbor's house. Jack and Jill run away and don't admit responsibility. The neighbor must pay a lot of money to repair the window.
B) Jack is afraid that Jill will get a better grade than him on their upcoming exam, so he steals her textbook to keep her from studying. Jill fails the exam. Afterward, Jack regrets his action, so he returns Jill's textbook and helps her study for the remaining exams to ensure that she gets a good grade in the course.
C) Jill is mad at Jack for stealing her textbook, so she intentionally elbows him in the ribs as she is packing up after class one day. It hurts Jack, but not very much. Jill doesn't apologize.
D) To ensure that she gets the best exam grade in the class, Jill lies to Jack and tells him that their final exam has been postponed because the professor is sick. As a result, Jack misses the exam and fails the class. Jill does not do anything to compensate Jack.