Which revision to the second sentence of the passage changes active voice to passive voice?

In active voice, the subject performs the action: “Eduardo Vega painted the mural.” To change it to passive voice, make the receiver of the action—the mural—the subject, and use a form of “be” plus the past participle: “The mural was painted last year.” Choice A stays active, and choice C also makes an artist the one performing the action.

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