The correct answer is B. No, but conducting frequent nuclear attack drills helped limit public hysteria by keeping Americans busy and reassured of potential survival.
During the 1950's and 1960's, Americans were fearful of nuclear warfare taking place between the United States and Soviet Union. The threat of nuclear attack scared millions of Americans. To curtail this fear, the federal government came out with the "duck and cover" method.
The goal of this program was to help people survive a possible nuclear attack by teaching them to duck under objects (like desks) and to cover their head for protection. Despite the fact that this would not work, as the buildings people were in would immediately collapse, it gave people hope that they could surive. This prevented more paranoia and fear from American citizens.
The correct answer is a rapid increase in population
Rapid population increases like those experienced in third world countries exert a huge pressure on limited natural resources and also put pressure on governments. This is especially complicated by the lack of education which leads to high poverty levels