It's sociology.
Sociology is the study of social problems.
When you have a row of dominoes set up, you knock over the first one, and what happens to the last one is the certainty that the last one will go over very quickly.
That was the U.S. fear about Communism. If one country became communist, the neighboring country would fall to communism just as the dominoes would fall.
The correct answer is B. Deflation is the reduction of prices.
Encouraging free trade between countries and helping countries negotiate trade conflicts are two most important jobs of the World Trade Organization. Most countries in the world are members of the said organization.
The answer would be letter D. World Trade Organization.
A and B because the quote explains that large groups of people got together to form associations so A and B both make sense for the question
