The U.S. relies so heavily on oil that if it disappeared then they would probably be dragged down unless they found a better solution.
The U.S needs oil because, it runs cars, and also many other things. It runs boats for trade, airplanes, runs electricity creation plants, and it also creates our roads.
Peter the Hermit was an attentive listener to Pope Urban II's cries and begged that people have to rescue the Holy Sepulchre. He was a monk and was part of the holy men in the audience. Because he was so stirred with the speech of Pope Urban II, he began preaching to men, women, and children in favor of war against the Turks.
He was able to gather many people and that started the Crusade. Alongside other leaders, he led one side of the troop and began the march. People waged to rescue Jerusalem from the Mohammedans. Therefore, the answer to this item is the first choice.
