Answer:
D) The American Revolution .
Explanation:
The American Declaration of Independence and Constitution inspired the French revolutionaries. The bond of France´s joining and supporting the American side in the Revolutionary War can´t be overlooked. The French Declaration of the Rights of Man and of the Citizen are mainly inspired in the ideas of Enlightenment, of thinkers such as Montesquieu, Voltaire and Rousseau.
This newly developed weapon used by Germany was the submarine.
It shortened the travel time and distance and improved trade.