This drug was the subject of a 2017 investigation of the University of Georgia's tennis program, and NFL cornerback Richard Sherman tested positive for it in 2013 before claiming that the sample was tainted. This drug, using a combination of salts from amphetamines, is administered for sufferers of narcolepsy and Attention Deficit-Hyperactivity Disorder. Name this Schedule II drug that has been used illegally for athletic and cognitive enhancement.
a) Cocaine
b) Ritalin
c) Adderall
d) LSD