C. Phobias are irrational fears about something. They are "irrational" because a person may fear something that would not logically pose any real threat or harm, such as fearing small spaces (claustrophobia) like elevators because one might feel like they are suffocating, even though elevators obviously do not cause people to suffocate.
<span>The least used
biomedical intervention for changing behavior is
Psychosurgery. Psychosurgery is also known as the neurosurgery for an
individual or people who have a mental disorder. Psychosurgery was used
during the times of 1930's to treat the mental disorder.</span>
I believe the answer is (a) variability