Answer:
they are other obstacles that prevent new competitors from entering an industry or area of business. barriers to entry benefit existing firms because they protect their revenues and profits
Explanation:
The answer is B, moral duty of the west to work to "civilize" the rest of the world.
The main way in which Roosevelt changed the role of the U.S. president during the New Deal is that he became extremely "active" in the US economy and social structure--in that through the New Deal the federal government played an unprecedented role in helping the economy recover from the Great Depression.
It was also an exchange of culture. When people from different cultures met they learned about each other and shared ideas.
