The Chain- Weighted Output Index Method of Calculating Real GDP

The chain- weighted output index method of calculating real GDP compares

A) compares the quantities of goods produced in consecutive years using prices in both years and averaging the percentage changes in the value of output.
B) prices at different points in time using a sample of goods that is representative of goods purchased by households.
C) quantities produced in different years with the prices that prevailed during the year in which the output was produced.
D) quantities produced in different years using prices from a year chosen as a reference period.