9. real gdp is: a. the market value of all goods and services produced by u.s. firms, adjusted for price changes. b. the sum of all environmentally harmful goods and services produced in the united states, adjusted for price changes. c. the market value of all final goods and services produced within the borders of a country in a year measured in today's prices. d. the market value of all final goods and services produced within the borders of a country in a year adjusted for price changes.
