Which of the following is true of the per capita real income of western Europe, Oceania, United States, Canada, and Japan?

A. It has increased each century and grown steadily since 1500

B. It is now more than 20 times greater than the figure of 1820

C. It rose steadily between 1000 and 1800, but the growth rate has slowed during the past 200 years

D. While income per person has increased since 1800, most of that growth occurred during the 19th century following the Industrial Revolution