What is one way gdp could be measured?

question 20 options:

multiply all goods and services produced in a 12-month period by their prices, then add them up

multiply all goods produced in a 12-month period by their prices, then add them up

multiply all services produced in a 12-month period by their prices, then add them up

multiply all goods, services, and structures produced inside our national boundaries in a 12-month period by their prices, then add them up