Final Answer:
The profession that requires a medical school (M.D./D.O. degree) is d-Psychiatrist.
Step-by-step explanation:
In the field of mental health, the distinction between professions often lies in the level of medical training required. Psychiatrists are medical doctors (M.D. or D.O.) who specialize in the diagnosis, treatment, and prevention of mental illnesses. Their extensive medical education involves four years of medical school after completing a bachelor's degree, followed by residency training in psychiatry. This comprehensive training equips them to understand the biological, psychological, and social aspects of mental health, and they are licensed to prescribe medications. Therefore, psychiatrists, indicated by option d, are the professionals in this list who require a medical school degree.
Psychologists, on the other hand, typically hold a doctoral degree (Ph.D. or Psy.D.) in psychology, but they are not medical doctors. They focus on psychotherapy, counseling, and research, and while they play a crucial role in mental health care, they do not prescribe medications. Mental Health Counselors, as mentioned in option a, may have various educational backgrounds, including master's degrees, and are often involved in counseling and therapy but do not go through medical school.
In summary, the answer to the question is option d, Psychiatrist, as this profession requires the completion of medical school and a medical degree.