Which Statement About the Use of the Polygraph or Voice

Which statement about the use of the polygraph or voice stress detection is not accurate?

A) The use of polygraph and voice stress equipment in administrative investigations is Controversial.
B) Agency employees normally cannot be compelled to submit to such an examination.
C) Results of this form of examination rarely can be used in disciplinary hearing or appeals even if given voluntarily by an agency employee.
D) The polygraph or voice stress examination are relatively useless when dealing with complaints and other civilian witnesses.