The answer is B: Coordinate propaganda efforts and shape public opinion.
Explanation for each option:
A. Enforce wartime censorship and restrict freedom of speech - This is incorrect. While the CPI did have some influence over the media and public information, its primary role was not to enforce censorship or restrict freedom of speech. Instead, it focused on promoting government-approved messages.
B. Coordinate propaganda efforts and shape public opinion - This is correct. The Committee on Public Information was established during World War I to influence public opinion and garner support for the war effort through various forms of propaganda, including posters, films, and speeches.
C. Conduct diplomatic negotiations with enemy nations - This is incorrect. The CPI was not involved in diplomatic negotiations. Its purpose was domestic, focusing on influencing American public opinion rather than engaging in international diplomacy.
D. Promote international cooperation and peace initiatives - This is incorrect. The CPI's role was not to promote peace initiatives or international cooperation. Instead, it aimed to build support for the U.S. involvement in World War I through propaganda.