Explanation: Stalin wanted to remain in power, and thus had an incentive to produce not just more goods, but positive political propaganda. Official governmental statistics (A) are often notoriously unreliable, designed to maintain or increase support for a government. German assistance is nowhere accounted for in the data at hand (B). Also, it was not until 1939 that Germany and Russia, who had supported opposing sides of those fighting the Spanish Civil War, signed a nonaggression pact. Kulaks (wealthy Russian peasants) had been mostly exterminated by the 1920s (D).