Final answer:
The economic system in which neither governments nor large corporations play a significant role is the Traditional economy, where community customs guide economic activities.
Step-by-step explanation:
Neither governments nor large corporations play a major role in a Traditional economy. In this economic system, the customs and traditions of the community shape the goods and services the economy produces, as well as the rules and manner of their distribution. In contrast, a Market economy is driven by individual consumers and firms making decisions about what to produce and purchase. A Mixed economy features a blend of market and command economy characteristics, and a Command economy is primarily controlled by the government. Therefore, the answer to the student's question is D. Traditional economy.