The Native Americans helped the French. The English were stealing the Native American's land and the Native American's felt that wasn't fair so they put their efforts and trust in the French. That is why it was called the French and Indian War because the French and the the Indians were allies and they fought together.
It failed because either the change did not work well in many business settings, or it was inefficient (due to the inefficiency of the conveyer-belt system). A more accurate reason is that the circuits couldn't handle the traffic during peak hour. The customer's orders were regularly mixed up. The conveyer-belt system was not fast enough or efficient enough to handle it.
B is the correct answer! :D
