Select the word that best completes the sentence: 'To prevent bias, the experimental protocol was designed to ______ any subjective intervention by the evaluators.'
Answer and explanation
Correct answer: C. preclude
- Step 1: Analyze context: experimental designs eliminate or make impossible subjective bias.
- Step 2: 'Preclude' means to make impossible, prevent, or rule out in advance.
- Step 3: 'Promote' means encourage; 'perpetuate' means maintain indefinitely; 'postulate' means hypothesize.
Answer
preclude.
Why not the others: 'promote' is the opposite meaning (encourage bias); 'perpetuate' means to sustain indefinitely; 'postulate' means to propose an assumption for debate.
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