I Believe The Answer Is C.
Exposition: Explains things before the story began and often provides background info on characters!
Rising Action: Plot begins to complicate and twist and Reveals point of view
Falling Action: Occurs after the climax and conflicts begins to be worked out and tensions lesson
The U.S. helped Japan rebuild economically after WWII and has maintained a peaceful relationship. The U.S. occupied Japan for four decades to make sure they did not rebuild their military.
Hope this helps
Poor or at risk means to figure out the cause of it, but if anyone is very sick, then that would be at risk and in poverty would mean to be poor. A group considered a vulnerable means stop at all costs and to never try it again until your sure it does not get anyone sick.<span />