Which choice completes the text with the most logical and precise word or phrase?

The scientist's ______ approach, testing every assumption twice, ensured that errors were rare.

Answer and explanation

Correct answer: C. meticulous

  1. Step 1: Identify the key contextual clue: the scientist is described as 'testing every assumption twice' to ensure 'errors were rare.'
  2. Step 2: Determine the tone and meaning required: an adjective meaning extremely thorough, careful, and attentive to detail.
  3. Step 3: Evaluate choices: meticulous directly means showing great attention to detail.
Answer
meticulous.
Why not the others: Hasty and careless mean rushed or sloppy, which would cause errors rather than prevent them.

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