All Except One of the Following Are Research Findings Regarding

All except one of the following are research findings regarding cognitively complex and simple people and differences between the cognitive conditions they represent. Which is NOT a complex-simple research finding?

A) Complex business-administration masters-degree candidates were higher on all the highly valued traits investigated.
B) Young males gave older males more extreme evaluations than they gave to members of their own age group.
C) When arousal was moderate or high, high complex subjects were more discriminating of non-verbal behaviors than low complex subjects.
D) Politicians who showed some tolerance for slavery were more complex than either extreme slavery supporters or abolitionists.