They were looking for gold and silver
While the Marshall Plan was, in part, created to stop the spread of communism, the Molotov Plan was there to encourage it. Money from the Soviet Union could be used to prop up nascent communist states in a similar way that the money from the Marshall Plan was attempting to rebuild western-style democracies.
Pamplets, writings, that sort of stuff
They were captured and inslaved
D) start their own colony