Which of the following is correct? a. Over the last 100 years Japan had a higher average growth rate than the United States. It follows that, today, the standard of living in Japan is higher than in the United States. b. The typical person in Bangladesh today has about twice the real income of a typical American 100 years ago. c. The typical citizen of China today has about one-half as much real income as the typical citizen of America today. d. None of the above is correct.