In the 1850s, the proportion of silver in the currency supply fell, and the proportion of gold rose. This is an illustration of :
a. the quantity theory of money.
b. Gresham's law.
c. Say's law.
d. the Walrasian auctioneer.
e. none of the above.
Question 2
During the 1990s, the nominal price of crude oil ____ and the real price ____.
a. leveled off; fell
b. fell; leveled off
c. rose; fell
d. fell; rose