From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. The officer...........

Answer Details

The best option that completes the sentence is "should have known". This is because the sentence is in the past tense, and the use of "should have known" indicates that the officer had a duty or obligation to not talk to the press on the matter, but he did not fulfill that duty.