D) were, singular
The voice is in active which leads to this answer.
If I'm reading this correctly, I'm guessing it would be the setting of the story. The setting is where the scene starts, like what you picture in your head when reading a book, or like a movie, the things around, such as the time, ex. 2:46 PM, in a Bookstore on the 12th of August on a Monday. That's setting.
i cant see the screen sksksk