An 8 year old patient with all primary molars still present exhibits a cusp-to-cusp relationship of permanent maxillary and mandibular first molars. The management of this patient should be to

observe.

plan serial extractions for more normal adjustment of the occlusion

refer the patient to an orthodontist for consultation.

place a cervical headgear to reposition maxillary molars

disk the distal surfaces of primary mandibular second molars to allow normal adjustment of permanent molars.