Answer:
D. As Susan entered the airport, she wondered if she was making the right decision.
Explanation:
i took the quiz and got it correct :)
6. D
7. A
9. A
I hope these are right and that this helps. ^^
Visual aids can help a person remember things better.
It is A. because THE usually refers to one object. In this case you have more then 1 object.
Also you can see which one would you say to someone, which one is more commonly used.
You should say tests and quizzes.