The nation given in the options that had a command economy is the D. Soviet Union.
What was the economy of the Soviet Union?
The Soviet Union was the first Communist nation in the world and they imposed a command economy.
This meant that all the means of production in the nation were controlled by the state which then made decisions concerning what to produce and who to produce for.
In conclusion, option D is correct.
Find out more on Command economies at https://brainly.com/question/511497.
