Your friend is a business owner in a planned economy. what decides how to allocate the productive resources he uses? price central authority

If your friend is a business owner in a planned economy, then it would be the "central government" that decides how to allocate the productive resources he uses, since the government "plans" the economy as opposed to having supply and demand take place in the marketplace. 

Actually, I just took the quiz on edg and the correct answer is c