Well have you had a basis to you're own answer? or would you like someone else to.
The answer is option B "psychiatrist." Psychiatrist are specialized in medicine and on finding cures for common diseases which would make them doctors. Also its not option A because a <span> psychologist is a person who studies in behaviors which is a therapist, its not option C because a social worker works mainly in families but not for the health. Its also not option D because a case manager who is placed to render court cases.
Hope this helps!</span>
For example I would do the stem.
The stem consists of xylem and phloem. The xylem is for transporting water and mineral ions which is absorbed by the root to the leaves. Meanwhile, the phloem is for transporting sucrose and amino acids from the leaves, to the storage place such as roots or stem.
Hair color, eye color, height, and even some disorders such as schizophrenia