Useful for treating ADHD. However, non-stimulants are significantly less effective than stimulants, with the response rate of about _________. Used if patient is not able to tolerate the physical or psychological side effects of stimulants or there's concern about abuse potential or doesn't want to take stimulants.

a) 90-100%
b) 75-85%
c) 50-60%
d) 25-35%