Which Statement About Tests of the Intellectual Achievement of Affluent

Which statement about tests of the intellectual achievement of affluent and poor children in various countries is TRUE?

A) Affluent children in the United States score higher than do affluent children in countries with greater income equality, such as Canada.
B) Affluent children in the United States score much lower than do affluent children in countries with greater income equality, such as Canada.
C) Poor children in the United States score higher than do poor children in countries with greater income equality, such as Canada.
D) Poor children in the United States score lower than do poor children in countries with greater income equality, such as Canada.