Joanna has suffered a series of personal setbacks, including the death of a family member, academic problems in college, and a divorce. she feels so sad, upset, and lonely that she is contemplating suicide. joanna could probably be best by a(n) psychologist.

Joanna could probably be best helped by a clinical psychologist.
Clinical psychology prefers to use talking and understanding a person's problems rather that resorting to the use of medical treatments to treat a patient. A clinical psychologist will talk to Joanna, and try to dig deeper into her psyche and try to help her understand that she shouldn't throw her life away and that things will be better if she works hard on her life.