C.
Article One of the United States Constitution establishes the legislative branch of the federal government, the United States Congress. ... Article One's Vesting Clause grants all federal legislative power to Congress and establishes that Congress consists of the House of Representatives and the Senate. - Wikipedia
It was because they were inspired by the renewed interest in Greek and Roman culture.
Before the Revolution
France was a monarchy ruled by the king. The king had total power over the government and the people. The people of France were divided into three social classes called "estates." The First Estate was the clergy, the Second Estate was the nobles, and the Third Estate was the commoners. (google)
War, Political Freedom, Religious Persecution, Unemployment, Low Wages
I would say that it is the fertile soil, the question seems incomplete though
