Which are indicators that economists use to measure how an economy grows? select all that apply.

There is a number of indicators to measure the growth of the economy, among them the most important are: 

GDP:
Gross Domestic Product. it measures the value of all the goods and services produced in the country. 

Because some of the GDP can come from a foreign-owned companies, people also introduced:
GNP: Gross National product, measuring the value of produce by a country (whether in or abroad)

Some other indicators are: 

Unemployment Rate
and the rate of inflation