An author's credentials can determine a health source's credibility. None of the other options would apply to credibility. When it comes to health, if you want to make sure that what you are researching or reading is authentic and reliable you need to find out whether the author is a professional health expert or not. You can do this by finding out their credentials.
Answer:
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.
