Mei is extremely upset because she has been falsely accused of stealing money from her employer. Her lawyer has suggested that Mei take a polygraph test to prove her innocence. She asks you whether she should agree to the test. Based on the research into the accuracy of polygraphs, you should tell Mei that polygraphs

a.are extremely accurate, and if Mei is truly innocent, she will pass with no problem.
b.only measure overall arousal levels and are not reliable indicators of whether or not peopleare lying.
c.sometimes wrongly indicate that innocent people are guilty, but are 100% accurate in detecting guilt.
d.sometimes wrongly indicate that guilty people are innocent, but are 100% accurate in detecting innocence.