Which of the following statements about real GDP is correct? a. Real GDP in current year equals Real GDP in base year if volume of production of all goods does not change between the two years. b. Real GDP in the current year measures the average change in economy-wide prices between the base year and the current year. c. Real GDP in current year equals Real GDP in base year if prices do not change between the two years. d. Real GDP in 2010 does not depend on whether the base year is 2002 or 2010