The Following Were All Findings of Russell Geen's Study of Introverts

The following were all findings of Russell Geen's study of introverts and extraverts EXCEPT

A) extraverts performed better when they chose their own level of arousal.
B) introverts performed better under conditions of low arousal.
C) extraverts and introverts had different levels of baseline arousal.
D) introverts preferred lower levels of arousal than extraverts.