During the Past 1000 Years, the Income Per Person of the World

Multiple Choice

During the past 1000 years, the income per person of the world has

A) increased each century, and it is now five times greater than the level of 1000 years ago.
B) risen rapidly in Western Europe, North America, Japan, and  Australia, but there has been little change in income per person in other parts of the world.
C) increased by approximately tenfold during the past 200 years, but there was only a small increase during the 800 years prior to 1800.
D) persistently increased, but the largest increases occurred during the 1200 to 1800 era.