The last one. D. explanation: don’t really have one I just looked it up
Imperialism is when a nation expands it's power through either war or diplomacy.
The benefits of imperialism is the power gained as well as the benefits that come with it. Some of the benefits include: the ability to more easily control trade, the ability to sometimes force a certain ideaology/religion, as well as strengthening political and military power.
The American Revolution was mainly cause by colonial opposition to the British attempt to place greater control over the colonies as well as to make them repay the crown for defending them during the French and Indian war.