Violation

Maxillary midline diastema can be caused by 1. a mesiodens. 2. congenitally missing lateral incisors. 3. a tongue thrust habit. 4. a thumb-sucking habit.

All of the above.

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only

Please describe the matter of abuse