According to the given sentences, the statement that is true include option C: Annual U.S. inflation rates rose considerably during the 1970s but declined to lower levels after the 1980s.
Inflation rate is defined as the rate that depicts the rise in the price of goods and services on a specified period of time.
At the time of 1970s, there was a sudden rise showed in the prices of goods and services in Annual U.S. rates along with declined in 1980s due to economic factors.
Therefore, correct option is C.
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