Which of the following periodontal procedures is indicated on a maxillary canine that will receive a full crown with subgingival margins when the abutment has 1mm of attached gingiva, no sign of inflammation or loss of attachment?

There is no indication that this tooth requires periodontal treatment.

Autogenous connective tissue graft.

Localized gingivectomy.

Coronally positioned flap.

Root planing.