Diagnostic casts for a fixed bridge allow the dentist to
1. visualize the direction of the occlusal forces.
2. assess occlusion more accurately.
3. plan the pontic design.
4. assess the esthetics using a diagnostic wax-up.

All of the above.

(4) only

(2) and (4)

(1) and (3)

(1) (2) (3)