Once a​ month, the bureau of​ ______ statistics calculates the consumer price​ index, which is a measure of the​ ______ consumers for a fixed basket of consumer goods and services.
a. ​labor; average of the prices paid by urban
b. labor​; non dash discounted prices paid by urban
c. labor​; non dash discounted prices paid by urban
d. price​; average of the prices paid by urban