Imports are subtracted in the expenditure approach to calculating​ GDP, because A. ​consumption, investment, and government spending are understated as these include expenditures on both domestic and foreign goods. B. the U.S. economy is not open to foreign trade. C. ​consumption, investment, and government spending are overstated as these include expenditures on both domestic and foreign goods. D. U.S. has a negative balance of trade.