Final answer:
Counselors must consider the well-being of their clients before making a diagnosis, and if it's believed that a diagnosis could be harmful, they must abstain from doing so according to ethical guidelines.
Step-by-step explanation:
The question addresses an ethical consideration in the field of mental health counseling. The correct answer is a) True. Counselors have a duty to prioritize their clients' well-being. If they believe that making a diagnosis would harm the client in any way, they must consider whether it is in the client's best interest to refrain from doing so. This could include situations where a diagnosis might lead to stigma, affect the client's self-esteem, or limit their opportunities. The ethical guidelines established by professional organizations such as the American Counseling Association emphasize the importance of nonmaleficence, which is the principle of doing no harm.