Which sentence maintains subject-verb agreement with a measurement expression?

Answer and explanation

Correct answer: B. Twenty kilometers was the distance covered by the relief convoy during the morning mission.

  1. Step 1: Expressions of time, distance, money, or weight representing a single unit or quantity take singular verbs. Step 2. 'Twenty kilometers was' correctly treats the distance as a single unit. Answer: Twenty kilometers was the distance covered by the relief convoy during the morning mission. Why not the others: 'Are' and 'were' incorrectly pluralize unified sums and time intervals.

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