C. The government
Vocabulary
First, it is important to define the key terms in the question and answers.
How Planned Economies Work
As its name suggests, a planned economy plans the economy out and the price of goods within the markets. These plans are created by the government. This means that private businesses, consumers, and supply/demand do not control prices. Only the government can do that because the government has full control of planned economies. This is the reason that planned economies are also called command economies because the economy is commanded by the government.