Answer:
D. North Korea
Step-by-step explanation:
Unlike other three nations provided as options, North Korea is a communist nation.
The central problems of an economy relate to answering the three questions of what to produce, how to produce and for whom to produce.
In a communist nation such as North Korea, the government is the supreme authority and citizens of such a nation do not exercise any influence or control on the output which shall be produced.
All the economic decisions are taken by the ruling government in such nations.
Hence, the correct answer is option (D). North Korea