Choose the correct passive voice transformation of the sentence:
They must have taken the intricate artifacts from the museum's security vault with great care.
Show answer & explanation
Correct answer: A
Explanation
The original sentence uses the modal verb 'must' followed by a perfect infinitive ('have taken'). To transform this into the passive voice, the object ('The intricate artifacts') becomes the subject, the modal 'must' is retained, and 'have taken' is transformed into the passive perfect infinitive form 'have been taken'.