The use of violence would not limit the effectiveness. It would aggravate it, actually, enough to land you in prison for a long time with no bail.
John Adams is trying to defend the British soldiers involved in the Boston Massacre. He is asserting that the soldiers used a justified amount of force to protect themselves. Hopefully that helps.
The answer is: Murmuring ;)<span />
The changes in technology, the cost of obtaining fuels, and the number of oil deposits discovered are some of the factors that helps predict the future of oil production. The number of oil refineries operating in the past does not predict to the future of the oil industry.
The answer is letter C.
13 - 5 = 8 (eight classical music discs were bought.)