The answer is D.
John Locke was the first to believe that the rights to life, liberty, and property should be protected by the government. He also was vocal on the idea that a government should have the "consent of the governed", meaning, leaders should be chosen by the people (voting).
He also believed that, if a government was acting in a way not in the peoples' best interest, they had a right to overthrow (revolution) that government and replace it with a government that did keep the peoples' interests at heart.