The Client's Mandibular Anterior Teeth Are in Linguoversion and Are

The client's mandibular anterior teeth are in linguoversion and are crowded. The clinician is having difficulty accessing the lingual surfaces of these mandibular anterior teeth. Which of the following patient positioning suggestions is BEST to ensure an ergonomic instrumentation technique?

A) Ask the client to lower his chin (chin-down position)
B) Lower the back of the client's chair until it is parallel to the floor
C) Ask the client to keep his chin in an upward position (chin-up position)
D) Stand up and work, with the client in an upright seated position