The government uses fiscal policy to manage the economy by

Controlling the rate of inflation.

Explanation:

Fiscal policy basically mean that the government will make some adjustment to their spending and tax rates depending on the current economic situation.

Inflation tend to cause the average price of consumer product become more expensive. The government can influence the rate of inflation through their fiscal policy.

When the government increase the amount of tax, it will reduce the amount of money circulated in the market and lower the rate of inflation. As a result, the price of consumers product  will become more affordable for the people.

the answer is d.index

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