Correct Option: D

Cooperative farming has succeeded only in countries with totalitarian government. It was at its best in the former USSR (now Russia). Cooperative farming was practised there in the form of collective farming in which member-owners engaged jointly in farming activities. There were both kolkhozy (cooperative-run type) and sovkhozy (state-run type) cooperatives. The collective farms were highly mechanized and the machine tractor stations, maintained by the state, played a crucial role in the success of these farms (Cooperation Principles, Problems and Practice, by T.N. Hajela, p. 489-502).