The correct answer is A. An individual’s treatment plan must be continually assessed and modified to meet the person’s changing needs.
Step-by-step explanation:
Rehabilitation programs or drug addiction treatments are designed to help individuals that had experienced drug abuse or addictions. Due to this, these programs do not only address medical aspects such as the process of detoxification but also aspects related to habits, emotions, past experiences, relations, among others that help the individual to change and avoid drugs in the future.
Additionally, treatment should be personalized and patients need to be continually assessed because not all addictions are identical and aspects such as causes are particular to each person; also, it is common patients need support to avoid drug abuse or in case this occurs. According to this, the one that is a principle for drug effective treatment is option A.