For each of the following, state whether it is considered money in the United States. Explain why or why not.
a. A check you write against deposits you have at Bank USA.
b. Brazilian reals.
c. The available credit you have on your Master Card.
d. Reserves held by banks at the Federal Reserve Bank.
e. Federal Reserve notes in your wallet.
f. Gold bullion.
g. Grocery store coupons