The correct answer is B) in a mass shelter.
According to Duck and Cover, the best place to be during a nuclear attack is in a mass shelter.
The reason that led to "duck and covers" drills and bomb shelters in the United States during the Cold War was the arms race.
When the Soviet Union exploited its first nuclear bomb in 1949, people in America got worried because they already knew what a nuclear bomb was capable of doing. And now, Russia had nuclear weapons. During the Cold War years, the arms race was the competition between the United States and the Soviet Union for supremacy in the production of nuclear weapons. So the "duck and covers" drills were mandated in public places and American homes in order to protect and know what to do in the extreme case of a nuclear explosion.
