Which of the Following Statements Is True

Which of the following statements is true?

A) Measuring economic growth as the rate of increase in actual real GDP is a valid measure.
B) Measuring economic growth as the rate of increase in actual real GDP lead to an inaccurate measure of economic growth.
C) Economic growth must be measured in nominal terms converted to real values each year.
D) Economic growth must be measured in real GDP terms and converted to nominal terms each year.