2. Which of the following statements about drug treatment IS TRUE? A. Residential therapy centers are more effective than methadone maintenance programs.
B. Methadone maintenance is more effective than outpatient drug-free programs.
C. The most effective treatment programs last less than 3 months but more than a week
D. The length of time spent in treatment is the single best predictor of a successful outcome.

D. The length of time spent in treatment is the single best predictor of a successful outcome

Explanation:

The success of a treatment is correlated to the length of the treatment period, which is the time spent in treatment

The longer the episode of treatment the increases in the probability of a successful outcome, than the outcome probability obtained in a short period or length of treatment time.

The quality of the treatment program and the candidate motivation are usually related to the retention rates of candidates in a program.

the answer is c dandruff