Now, I cant say im 100% confident this is the answer, but it isn't B even though a war happened. A isnt right either in my opinion, as even though they didnt like the boundary problems after the French and Indian war, they werent terribly riled up. To me, I'd say its unfair taxes, as no taxation without representation was a big thing then. Also Interference from royal governors wasnt the problem often, it was the no contact.
