Which statement BEST explains the relationship between literacy and standard of living?

A.
The higher the rate of literacy in a country, the wealthier the country as a whole is likely to be.

B.
The lower the rate of literacy in a country, the higher the average wage level for workers is likely to be.

C.
The lower the rate of literacy in a country, the lower the level of income inequality in that country is likely to be.

D.
The higher the rate of literacy in a country, the higher the level of unemployment in that country is likely to be.