Which sentence is in the passive voice?
AThe librarian is now reading a story to the children.
BIn the middle of the night, the mother calmed the baby by rocking him.
CSome penguins waddled across the glacier.
DThe role has been performed by several actors.
AThe librarian is now reading a story to the children.
BIn the middle of the night, the mother calmed the baby by rocking him.
CSome penguins waddled across the glacier.
DThe role has been performed by several actors.