According to the World Bank's classification of countries' levels of per capita gross national income,
A) about one-third of the world's population lived in high-income countries in 2007.
B) less than 20% of the world's population lived in high-income countries in 2007.
C) the percentage of the world's population living in high-income countries increased significantly between 1997 and 2007.
D) the percentage of the world's population migrating from middle-income to high-income countries has been increasing since 2000.

Question

Quizplus · Accepted Answer

According to the World Bank's 2007 classification, only about 15% of the world's population lived in high-income countries, meaning that choice B is correct. The other three options are incorrect: choice A is too high, choice C is incorrect as the percentage of the world's population living in high-income countries did not increase significantly between 1997 and 2007, and choice D is also incorrect as there is no evidence to suggest that the percentage of the world's population migrating from middle-income to high-income countries has been increasing since 2000.

According to the World Bank's Classification of Countries' Levels of Per