Select the option that expresses the given sentence in passive voice.
The Mesopotamians invented the decimal system.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. The decimal system was invented by the Mesopotamians.
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In the passive voice, the object of the active sentence ("the decimal system") becomes the subject, and the subject of the active sentence ("the Mesopotamians") becomes the agent with the preposition "by."
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This restructuring maintains the same meaning while shifting the focus from the doer of the action to the action itself.