The answer is C, the US successfully tested an atomic bomb.
If you mean the United States, the answer is non of the above.
If you mean the United States Citizens, the answer is A, B, and C.
Many soldiers suffer PTSD and can experience nightmares or anxiety because of it. some soldiers act cold when they return home or more distant than they once were. its common for soldiers to feel more on edge and lack being vulnerable.
History politics & society ancient Egypt