Violation

For a cast gold restoration, a gingival bevel is used instead of a shoulder because a bevel 1. protects the enamel. 2. increases retention. 3. improves marginal adaptation. 4. increases the thickness of gold.

(1) and (3)

(1) (2) (3)

(2) and (4)

(4) only

All of the above.

Please describe the matter of abuse