What is the correct answer? The Consumer Price Index (CPI): a) is the average dollar price of all goods and services produced in the economy. b) shows the price of a basket of consumer goods at some specific time relative to the price of the same basket of consumer goods in some base period. C) must always be equal to 100 in any time period. (d) is always greater than 100 except in the base period. (e) None of the above