Correct Answer: Maria was disturbed terribly by an unexpected call which compelled her to stop the performance.

Solution : The correct choice is the first option .

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

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

Therefore, the sentence in passive voice is: Maria was disturbed terribly by an unexpected call, which compelled her to stop the performance.