The correct option is A 1927 to 1938
In the first two five-year plans, 1927 to 1932 and 1933 to 1938, the Bolshevik government fixed all the prices to promote industrial growth in Russia. It proved to be a huge success for the Russian economy. Between 1929 and 1933, industrial production of oil, coal, and steel increased by a whopping 100%. Wherever there were factories, cities started to emerge and soon, there were many new factory cities.