Identify the option that represents the given sentence in the active voice:

The car was driven by John to the mechanic for repairs.

In the original sentence, "The car was driven by John to the mechanic for repairs," the sentence is in the passive voice because the subject (the car) is receiving the action, and the doer of the action (John) comes after the verb.

To convert the sentence into the active voice, we need to make John the subject of the sentence and have him perform the action. The original sentence is in simple past tense, so the tense should be maintained. We see that only option C has simple past tense.