When taking radiographs on a 10 year old child, which of the following should be used to decrease radiation exposure?
1. A lead apron.
2. A decrease of the kilovoltage to 50kVp.
3. Use of high speed film.
4. Application of a radiation protection badge.

(2) and (4)

(1) and (3)

(1) (2) (3)

All of the above

(4) only