Which of the following is an example of the use of public diplomacy during the Cold War?

a. the Voice of America program, established by the Office of War Information, that broadcast pro-U.S. information into Nazi Germany.

b. the establishment of an Office of Global Communications, designed to enhance the United States' reputation abroad and counter the image of the United States as the "Great Satan".

c. President Harry Truman's Campaign of Truth that led to the creation of the U.S. Information Agency, which focused on countering negative propaganda from the Soviet Union and communist organizations.

d. government-produced posters that encouraged people to reduce waste and grow vegetables in "victory gardens".

e. distribution of pro-United States bumper stickers by the U.S. Information Agency that began shortly after World War II as part of the Marshall Plan.