The Consumer Price Index for a Given Year Measures the Cost

The consumer price index for a given year measures the cost of living in that year relative to

A) what it was in the base year.
B) what it was in the previous year.
C) the cost of the basic goods and services need to sustain a typical household.
D) the amount spent on goods and services by the randomly selected families in the Consumer Expenditure Survey.
E) the cost of the basic goods and services in the base year.