Answer:
d. Her school.
Explanation
She might have not started school. That's why. You can't have your imaginary class in bedrooms, dining rooms and other places.
Hope this helps......
C. is the correct answer.
C is the only answer choice that refers to the future ("a sign, he said, a sign"). The rest of the answers refer to things happening in the present in the story, with almost no reference to the future of the plot.
I would say that you would only use them when you are writing in the thousands or more other than that u don't use them