Answer: It's not one of the answers, but it's I and IV, and III is partially correct.
Explanation: The first is pretty much exactly what happened. The second is partially true- The leader of the Green Mountain Boys (the unit that took the fort), Ethan Allen, agreed to let Benedict Arnold assist him, at the bequest of Congress. The third is definitely false, no American died, only one was slightly wounded by a sentry. The fourth is true- Henry Knox had to move them to Boston, where Washington placed them on Dorchester Heights, overlooking the city.