Answer:I believe the answer is tanks.
Explanation:Tanks are armored vehicles designed to combine the military factors of fire, maneuver and protection. Although the concept of armored vehicles preceded the Great War, the tank was specifically developed to overcome the stalemate of trench warfare on the Western Front that followed the First Battle of Ypres (19 October-22 November 1914). The marrying of recent technological advances, such as the internal combustion engine with armor plating, enabled the tank’s development during World War I.
One, guns. Before guns, people were still stabbing each other with swords and spears, and warfare was a lot more quiet. Guns are like killing MACHINES compared to swords and co., so much so as that they have nearly completely overcome the weapon industry. Two, the atomic bomb. The atomic bomb allowed people to create mass destruction in a small amount of time. In fact, (theoretically speaking) even someone as fast as the flash could not outrun an atomic bomb. It also makes an area unable to inhabit any sort of life for an extremely long time, because of the lasting effects of radiation.
B. The answer is B. Citizenship
Descartes´ purpose in writing Discourse on Method was to find a clear and distinct form of knowledge devoid of any kind of uncertainty brought about by the senses or by confused and obscure ideas.