Final answer:
In a command economy, private ownership of businesses and market forces are prohibited. Centralized government control and consumer choice are not prohibited.
Step-by-step explanation:
In a command economy, the government decides what goods and services will be produced and what prices it will charge for them. The government decides what methods of production to use and sets wages for workers. The government provides many necessities like healthcare and education for free. Currently, Cuba and North Korea have command economies.
From the description above, a) Private Ownership of Businesses is prohibited. In a command economy, all businesses are owned and controlled by the government.
Furthermore, c) Market Forces is prohibited as well. In a command economy, market forces such as supply and demand do not play a significant role in determining what is produced or how it is priced.
However, it's important to note that b) Centralized Government Control and d) Consumer Choice are not prohibited. In fact, they are key characteristics of a command economy. The government has centralized control over the economy, making decisions on production, pricing, and wages. Consumer choice, however limited, is still present, as the government determines the availability and allocation of goods and services.