Which of the Following Statements About Polygraph Tests Is True

Which of the following statements about polygraph tests is true?

A) Even under optimal conditions, they seldom perform better than chance.
B) Despite unreliability, test results are used in court in Canada.
C) Despite unreliability, test results are used in court in most states.
D) Researchers say that there is no scientific basis from which to expect that polygraphs could be extremely accurate.
E) They are better at detecting lies than at detecting truthful responses.