Jim Crow laws and the heavy segregation down in South
Answer: I called for Sadie. Sadie didn't answer. I waited up for Sadie. Sadie didn't come home.
Answer: Areas of defense in times of war
Explanation:
The except speaks of the potential of national unity in the United States being shattered as a result of a lack of a common enemy that the World Wars and Communism gave them.
The Fault lines in the excerpt refer to demarcations between opposing sides in the World Wars and in the Cold War that people then gathered behind to fight against their enemy. This made these lines become Areas of defense in essence that everyone came behind in solidarity to defeat their World War and Cold War enemies.
The answer that best fits the blank provided is the term PARADOS. Literally, the term "parados" means entrance. In the given scenario above, it is classified as parados for it serves as the start before the rising action happens. The answer for this would be A.