7. The whistleblower revealed that a _____ surveillance program had been operating within the agency, systematically collecting data on employees without their knowledge or consent.
(A) covert
(B) illicit
(C) discreet
(D) concealed
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統計: A(1), B(1), C(1), D(1), E(0) #3955147
統計: A(1), B(1), C(1), D(1), E(0) #3955147