Answer:
a. For America to exert its influence on the world.
Step-by-step explanation:
In the book, Henry Luce wrote about middle 20th century and the role of USA during those year, especially after the World War II. There were some thoughts about lack of the influence of USA during World War I and it should be fixed for World War II. It was researched that time and why American people are not happy or which problems they care about. There was tough political and economic situation so USA should choose new pathway or strategies to be the main actor of the world. The focus of the points was in order to be the power in the world. That’s why the cure was to accept that American nation was the most powerful and duty about that then they should exert upon the world the full impact of their influence for such purposes.