A

Government control over production (answer B) is correct due to the definition of a command economy being an economic system that is centrally planned and guided by the government.

Explanation:

The characteristics of a planned economy are lessened private ownership and diminished income-driven initiative, which leads to the decrease of consumers’ buying power and eliminates answers A, C, and D.

Command economies are often prevalent in socialism and may be juxtaposed to capitalism and the capitalist free market. Vivid examples of command economies are most Latin American countries, some Asian countries, such as China, and Union of Soviet Socialist Republics that is non-existent today.

The advantages of a command economy are the growth of heavy industry and the provision of cheaper goods and services, as the government may be permitted to be less profit-driven.

Economic Systems Mixed Economies.
The Economic Spectrum (Source: https://www.adamsmith.org)