In treatment planning for a fixed bridge, the necessary clinical data should include
1. an assessment of any discrepancy between centric occlusion and centric relation.
2. the type of impression materials to be used.
3. an evaluation of the forces of mastication.
4. the aesthetic considerations.

(1) (3) (4)

(1) (2) (3)

(1) and (4)

(2) and (4)

(4) only