Which of the Following Are Considerations When Dealing with a History

Which of the following are considerations when dealing with a history of cervical muscle pathology in a dental setting? (Select all that apply. )

A) Patients always can be made to sit themselves in an ergonomically correct position in the dental chair.
B) Patients may not be able to raise the chin as requested during treatment.
C) Patients may possibly have related headaches in the anterior skull region.
D) Additional supports and stabilizers such as pillows may make the patient more comfortable.