Stalin increased support for communism through all of the following, except

a.) propaganda
b.) force
c.) suppression
d.) diplomacy

The answer is letter D. Stalin increased support for communism through all of the following, except diplomacy. 

Joseph Stalin used means such as propaganda, force and diplomacy to further communism. He went to the extent of sending soviet forces such as secret service & intelligence to ensure foreign Communist parties remain pro-Soviet.

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