Several Decades Ago, the Gap Between the IQ Scores of African

Multiple Choice

Several decades ago, the gap between the IQ scores of African Americans and White Americans was estimated to be about 15 IQ points. Research from 2002 suggests that in 30 years that gap closed by about ________ points.

A) 1 to 3
B) 2 to 5
C) 4 to 7
D) 7 to 10