Violation

(An) important clinical sign(s) of gingivitis is/are 1. bone loss. 2. cyanosis of tissue. 3. the presence of minimal attached gingiva. 4. bleeding on gentle probing.

(2) and (4)

(1) (2) (3)

(1) and (3)

(4) only

All of the above.

Please describe the matter of abuse