If a patient loses a permanent maxillary first molar before the age of 11, the
1. premolar drifts distally.
2. maxillary second molar erupts and moves mesially.
3. opposing tooth erupts into the space created.
4. overbite increases.

All of the above.

(1) (2) (3)

(1) and (3)

(2) and (4)

(4) only