Question

• did the u.s. enter wwi to \make the world safe for democracy,\ or for economic reasons?
• how did the war change everyday life for women and african americans?
• would the league of nations have worked better if the u.s. had joined?

Explanation:

These questions pertain to the history of the United States during World War I, including its motives for entry, social impacts on specific groups, and the potential outcome of the League of Nations with U.S. participation. The subfield of History within Social Science is the most appropriate as it deals with the study of past events, their causes, and their effects on society.

Answer:

The subfield that best applies to these problems is History (under Social Science).