The correct answers are:
1. D.All of the above are correct.
2. A.quantity theory of money.
3. B.increases, and so the value of money falls.
4. C.the Federal Reserve System.
5. D.real variables.
6. B.nominal variables.
7. D.is a determinant of both real and nominal variables.
8. D.All of the above are correct.
9. B.increase the price level.
The answer for number 10 is attached below.