Which Statement Best Summarizes the Research Findings of Arthur Jensen

Which statement best summarizes the research findings of Arthur Jensen regarding racial differences in intelligence?

A) Level II tasks were performed equally well by children from all races, ethnic groups, and social classes.
B) Performance on Level II tasks tended to decline with age while performance on Level I tasks tended to improve with age.
C) Level I abilities show more heritability than Level II abilities.
D) Middle-class and white children outperformed lower-income and African-American children on Level II tasks but not on Level I tasks.