The revolution, if we hadn't retaliated we may still be British run. Second, the Boston Massacre one of the events that provoked the revolution. The Boston Tea Party, one of the first acts of retaliation because this was one of the first times we showed our anger in an action and not words.
I would go with D seems like the right answer
France, because the western front was fought within france.
Russia had lost a lot of people (soldiers), but did not suffer as much structural damage as France