Which of the Following Is True About the Use of Polygraphs

Multiple Choice

Which of the following is true about the use of polygraphs (lie detectors) ?

A) The polygraph is worth using because it does not often misidentify innocent people as liars.
B) It is a psychological misconception to conclude that the polygraph is a reliable technique for identifying people who are lying.
C) It is not possible to beat a polygraph test that is conducted by a qualified polygraph operator.
D) Results from polygraph tests are commonly used as evidence in courts of law.