The option that best describes the efforts of the Committee on Public Information is C. Propaganda campaign.
The Committee on Public Information (1917-1919), also known as the CPI or the Creel Committee, was an independent agency of the government of the United States created seeking to influence public opinion to support US participation in World War I.
.It used mainly propaganda in an attempt to create enthusiasm for the war effort and to enlist public support against the foreign and perceived domestic attempts to stop America's participation in the war.