Answer: E. command economy
A command economy is an economy where the government decides what goods and services need to produced, the quantity to be produced and the price at which the products are to be sold. Hence a frim has no say in pricing its products.
The government is also the deciding factor with respect to the allocation of resources for investment and fixes incomes. A command economy is also known as a planned economy. North Korea and Cuba are examples of countries that have a command economy.