How reliable are polygraph results considered when used as evidence in courtroom settings?
a. Not reliable enough to be submitted as evidence in most types of courtrooms.
b. Relatively reliable, on about the same level as the testimony of a credible eyewitness.
c. Only slightly more reliable than no evidence, on about the same level as the testimony of a questionable eyewitness.
d. Very reliable, on par with relatively certain forensic evidence like DNA testing.