Answer:
a. standard of living.
Step-by-step explanation:
Per capita Gross Domestic Product (GDP) represents an economic scale that quantifies the economic output of a country in relation to the total population of that country.
Mathematically, per capita GDP is derived by dividing the total GDP of a country by the population of that country. It gives an indication of how productive each individual of a country is and hence, a good measure of their standards of living.
The correct option is therefore, a.