Why Is Treatment for Stimulant Dependence Difficult

Why is treatment for stimulant dependence difficult?

A) Doctors are generally reluctant to treat sufferers of substance abuse.
B) Stimulant abusers tend to use other drugs to counteract some of the effects of the stimulants, and become dependent on these drugs as well.
C) Stimulants are very addicting and it often takes many years to quit using them.
D) Psychological and biological treatments must be used in conjunction, never separately.
E) It is easier to treat those who are addicted to socially acceptable drugs.