A. Original sin
This should be the answer
Answer:
As it gained momentum, the abolitionist movement caused increasing friction between states in the North and the slave-owning South. Critics of abolition argued that it contradicted the U.S. Constitution, which left the option of slavery up to individual states
Renaissance was a cultural movement that began in Italy and spread across Europe while reformation was the Northern European Christian movement. Renaissance paved the way for the advancement in art and architecture, whereas Reformation paved the way for religious fragmentation.
B- United Nations was formed in 1945 to promote international order
At the beginning of the 1960s, many Americans believed they were standing at the dawn of a golden age. On January 20, 1961, the handsome and charismatic John F. Kennedy became president of the United States. His confidence that, as one historian put it, “the government possessed big answers to big problems” seemed to set the tone for the rest of the decade. However, that golden age never materialized. On the contrary, by the end of the 1960s it seemed that the nation was falling apart. In the 60s there was a defining civil war. Not all Americans where on favour of the war because not all agreed. Unfortunately, the War on Poverty was expensive–too expensive, especially as the war in Vietnam became the government’s top priority. There was simply not enough money to pay for the War on Poverty and the war in Vietnam. Conflict in Southeast Asia had been going on since the 1950s, and President Johnson had inherited a substantial American commitment to anti-communist South Vietnam. Soon after he took office, he escalated that commitment into a full-scale war. In 1964, Congress authorized the president to take “all necessary measures” to protect American soldiers and their allies from the communist Viet Cong. Within days, the draft began.
The war dragged on, and it divided the nation. Some young people took to the streets in protest, while others fled to Canada to avoid the draft. Meanwhile, many of their parents and peers formed a “silent majority” in support of the war.