Cultural diffusion is the spread of cultural beliefs and social activities from one group to another. so the answer is A.
Answer: Improved communication and better computers
Explanation:
The Library of Congress Prints & Photographs Division has extensive holdings of World War I era posters. Available online are approximately 1,900 posters created between 1914 and 1920. Most relate directly to the war, but some German posters date from the post-war period and illustrate events such as the rise of Bolshevism and Communism, the 1919 General Assembly election and various plebiscites.
B Stalin's five year plans in the Soviet Union
