Which Statement About Cocaine Abuse/dependence and Cognitive Function Is True

Which statement about cocaine abuse/dependence and cognitive function is true?

A) Despite their compulsive drug use, people diagnosed with cocaine abuse or dependence do not show significant abnormalities on standard tests of cognitive function.
B) Any cognitive deficits observed in cocaine abusing/dependent individuals must have been caused by their drug use, since numerous longitudinal studies have demonstrated that these individuals had normal cognitive function prior to the onset of drug use.
C) Some abnormalities in cognitive function have been related to reduced gray matter volume of specific brain areas, based on MRI studies.
D) Loss of white matter is the most important effect of cocaine that results in cognitive deficits.