Answer: Prohibition period from the early 1920s.
Explanation:
Many examples throughout history have had both positive and negative effects on society. Prohibition is one of the better examples. If alcohol were banned in the United States today, for example, there would be a "boom" of the country's black market. Alcohol would be made illegally and distributed on the black market. A positive response would be a reduction in the rate of violence and crime, given that a certain percentage of crime is linked to alcohol.
The Prohibition Period, however, proved to be a failed experiment in American history. The black market has risen sharply, and certain criminal groups have profited greatly. That profit is at the expense of the state since it is not legal. The ban creates a grey economy which badly affects the regular economy of the state.
The answer to your second question is D.) Welfare
Okay, so obviously nuclear weapons proved to be a threat that would possibly destroy the world. The Soviet Union and the United States build up a stockpile of nuclear weapons and used the fact that the world may be destroyed to keep the other country at bay.
