The correct answer is D. Command economy
Step-by-step explanation:
Command economy is a type of economic system in which it is the government and not people the ones the entity that takes decisions such as the products manufactured, the regulations for trade, prices of goods, etc. Because of this, it is in this economic system the means of production are likely to be owned by the government as the government leads all economical processes.
This does not commonly occur in other systems such as mixed economy because in this the government intervenes and participates in the economy but does not control all economy or in the market economy in which means of production are owned by particulars. Thus, the economic system in which is most likely factors of productions are owned by the government is Command economy.