Answer:
The correct option is C) "The cause is unknown, but we suspect it is due to an immunologic mechanism."
Step-by-step explanation:
Alopecia areata can be described as an autoimmune disorder which is characterized by hair loss. For some people, only some hair might be lost in patches but for other people the hair loss might be severe. In severe conditions, all the hair from the head and even from the entire body can be lost. Alopecia areata is a common disorder and every one in five peoples experiencing the disorder also has another member of the family with the same disorder.