Answer:
Between 1970 and 1973, during the Vietnam War, the United States bombed much of the countryside of Cambodia and manipulated Cambodian politics to support the rise of pro-West Lon Nol as the leader of Cambodia. The Khmer Rouge used the United States’ actions to recruit followers and as an excuse for the brutal policies they exercised when in power.
Explanation:
"As Lorena Hickok traveled through 32 states , she regularly penned letters to Harry Hopkins and the Roosevelts detailing what she saw. She reported that unemployment had devastated city dwellers and farmers alike . Those without jobs endured the hardships caused by economic insecurity as best they could "
-Quora
B because in order for the reader to understand how the storyline is going to you need to start off with a good hook.