Based on research studies, Buffy may reduce the accuracy of the polygraph to 20%.
Polygraph is a lie detector test that calculates and documents various physiological pointers such as blood pressure, pulse, respiration, and skin conductivity during interrogation.
Given that Buffy is a con artist with training in biofeedback and other relaxation techniques, research has shown that Buffy would reduce the polygraph accuracy by 20%.
Hence, in this case, it is concluded that the correct answer is "20%."
Learn more about polygraphy here: https://brainly.com/question/9537347
