The plan was approved ______ the board without any discussion.

Answer and explanation

Correct answer: A. by

  1. Step 1: The agent of a passive verb is introduced by 'by'.
Answer
by.
Why not the others: "from" is wrong because 'from' does not mark the agent of a passive. "through" is wrong because 'through' suggests a path or means, not the doer. "with" is wrong because 'with' would suggest an instrument or accompaniment.

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