An 8 year old child has an 8 mm diastema between teeth 1.1 and 2.1. This could indicate the presence of
1. an enlarged frenum.
2. a cyst.
3. one or more mesiodens.
4. normal development.

(1) and (3)

(1) (2) (3)

(2) and (4)

(4) only

All of the above.