Choose the sentence that correctly uses the subjunctive mood after an expression of necessity:

Answer and explanation

Correct answer: A. It is imperative that every medical resident adhere strictly to hand hygiene protocols.

  1. Step 1: Identify subjunctive trigger: 'It is imperative that...' Expresses vital necessity requiring the mandative subjunctive.
  2. Step 2: State rule: Subjunctive verb form is always the uninflected bare base form (no -s, no -ed, no will).
  3. Step 3: Select 'adhere' (not 'adheres').
Answer
It is imperative that every medical resident adhere strictly to hand hygiene protocols.
Why not the others: 'adheres' erroneously inflects for third-person singular; 'adhered' uses past indicative; 'will adhere' uses a future auxiliary.

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