题目10单选题
Which of the following events would affect the CPI but not the GDP deflatorA. Volvo, the Swedish auto maker, raises the prices of the cars it sells in the United StatesB. Boeing, the American airplane manufacturer, raises the price it charges the U.S. Air Force for fighter jetsC. Barbers around the country raise the prices they charge for haircutsD. Kelloggʼs, the American cereal maker, cuts the price of a box of corn flakes