AP Human Geography

Answer - B - The literacy rate of any country correlates most closely with per capita income.

Key Takeaway: The literacy rate is the direct proportion of the population over age fifteen that can read and write at a basic level. When this ratio is compared across countries, it becomes obvious that the literacy rate of a given country directly corresponds with that country’s per capita income (i.e., the higher the per capita income in the country, the higher the literacy rate). Because of this, for high-income countries, a 99% literacy rate is often assumed, though that may not always be the case.