Correct Answer: Were you informed by anyone about the changed schedule?

Solution : The correct choice is the second option.

Explanation: In the passive voice, the object of the active sentence becomes the subject, and the subject of the active sentence becomes the agent in the passive construction.

The structure of the passive voice sentence is interrogative verb ("were") + subject ("you") + past participle of the main verb ("informed") + agent ("by anyone") + object ("about the changed schedule")?

Therefore, the correct answer is: Were you informed by anyone about the changed schedule?