Correct Answer: The newly introduced car was sold to the highest bidder by the company.

Solution : The first option is the correct choice.

Passive voice is the voice in which the object experiences an action rather than the person who acts. Hence, the object in the active sentence becomes the subject in the passive voice.

The structure of a passive voice in the case of the simple past tense is: "Singular object + was + past participle form of the verb + by followed by the agent of the action."

Therefore, the correct answer is: "The newly introduced car was sold to the highest bidder by the company."