Which of the Following Is True of the Polygraph

Which of the following is true of the polygraph?

A) Polygraph results are regularly admitted as evidence in Canadian courts.
B) The most common polygraph method used currently is the Comparison Question Test (CQT) .
C) The polygraph directly measures whether a person is lying.
D) Rresearch indicates that physical countermeasures are largely ineffective in "beating" the polygraph.
E) Research conducted thus far indicates the polygraph is highly accurate at detecting deception.