A Korean steel company produces steel in the United States, with some of its steel being exported to other nations and some of it being sold within the United States. If the prices of this steel increase, then a. the GDP deflator and the CPI will both increase. b. the GDP deflator will increase and the CPI will be unchanged. c. the GDP deflator will be unchanged and the CPI will increase. d. the GDP deflator and the CPI will both be unchanged.