The yardstick most often used to compare living standards across nations is:

A) the average production cost per unit.
B) the sales revenue per month for all the firms in an economy.
C) utility per capita.
D) the output per capita.
E) the volume of imports per year.

Living Standards

indicate the wealth, comfort, material goods, and necessities available to a person or society, often used as a measure of economic well-being.

Output Per Capita

The average production of goods and services per person, often used as a measure of a country's standard of living or economic performance.