On no condition ______ any classified intelligence documents to non-cleared personnel.

Answer and explanation

Correct answer: D. should civil servants disclose or transmit

  1. Step 1: The restrictive negative phrase 'on no condition' at the start of a sentence triggers obligatory subject-auxiliary inversion. The modal auxiliary 'should' precedes the subject 'civil servants', followed by the base verbs 'disclose or transmit'. Answer: should civil servants disclose or transmit. Why not the others: "officers must be sharing" fails to invert the subject and auxiliary following the initial negative restrictive phrase; "employees will disclose" omits required inversion and changes deontic prohibition to an affirmative prediction; "ought staff pass secrets" uses 'ought' without its required particle 'to', violating English modal grammar.

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