Stimulant Medications Such as Methylphenidate (Ritalin) Are Often Used in the Treatment

Stimulant medications such as methylphenidate (Ritalin) are often used in the treatment of children with ADHD. These medications

A) have not been found to improve any of the symptoms of ADHD.
B) are most effective if combined with other forms of treatment.
C) require more rigorous research to determine the extent of their benefits.
D) increase vigilance, reaction time, short-term memory, and learning of new material.
E) are most effective with the more difficult cases.