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if you were writing an essay on the use of undercover narcotics officers in high schools to fight the selling and using of illegal drugs, which research source listed below is most likely to be unbiased, accurate, and credible?

a) an interview with an undercover narcotics officer who caught several high school students
b) an interview with a judge who presided over many cases involving undercover narcotics officer arrests
c) an interview with a teenager who was caught selling drugs at school by an undercover narcotics officer
eliminate
d) an interview with a mother who led protests against her son's arrest by an undercover narcotics officer