What has been identified as a major problem particular to the Comparison Question Test (CQT)?

a.
the use of extra-polygraph cues by the examiner

b.
high false-positive rate

c.
high false-negative rate

d.
falsely classifying guilty suspects as innocent

b. high false-positive rate

The major problem identified in the Comparison Question Test (CQT) is option D - falsely classifying guilty suspects as innocent.