The Consumer Price Index (CPI) Is a

The Consumer Price Index (CPI) is a

A) statistical measure of a weighted average of prices of a specific set of goods and services purchased by consumers in urban areas.
B) statistical measure of a weighted average of prices of commodities that firms produce and sell.
C) price index measuring the changes in prices of all new goods and services produced in the economy.
D) statistical measure of average prices using annually updated weights based on surveys of consumer spending.