Which Brain Study Method Is in Use as a Potential

Which brain study method is in use as a potential alternative to the traditional polygraph machine? How accurate is this alternative?

A) The EEG is in use as an alternative to the polygraph machine. It is more accurate than chance, but results are far from perfectly accurate.
B) The EEG is in use as an alternative to the polygraph machine. It is about 90% accurate.
C) The fMRI is in use as an alternative to the polygraph machine. It is more accurate than chance, but results are far from perfectly accurate.
D) The fMRI is in use as an alternative to the polygraph machine. It is about 90% accurate.

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