While diagnosing a seat belt that will not buckle, Technician A looks inside the buckle and disassembles it to remove any obstructions that may prevent it from latching onto the belt latch. Technician B replaces the buckle if an obstruction cannot be easily removed from the buckle. Who is correct?
1) Technician A only
2) Technician B only
3) Both A and B
4) Neither A nor B
