The answer is A. the sinking of the Lusitania
Douglas argued that slavery was a dying institution that had reached its natural limits and could not thrive where climate and soil were inhospitable. He asserted that the problem of slavery could best be resolved if it were treated as essentially a local problem
They needed a bill of rights to persuade people that the federal government would protect their rights. To protect the Liberty of each individual.
There are two examples. 1. World war 1. In which case, many countries formed a league in order to prevent such an event from happening again. The league is called the "League of Nations" which composed of many European countries but it was ineffective because of the little military backing it had because the U.S did NOT join the organization. Another example would be World war 2 in which became the deadliest and most causality rated war in history. Over 50 million people died. After the war, the United States became the leader of the free world and helped form the United Nations which is composed of about 193 nations out of 196-198 nations in the world. The League of nations disbanded and the United Nations took its place and still exist today as a peacekeeping organization.
Gas prices more than tripled