Technological change that makes workers more productive should increase the demand for labor

Assume that the government of a nation rations the crude oil available to car owners each month which reduces the overall demand for petroleum. However, the nation continues to import oil from the world market. Which of the following will be observed in the oil market?

a. The world price of petroleum would decline. b. The domestic price of petroleum would decline. c. The domestic price of petroleum would increase. d. The world price of petroleum will remain unaffected.

If one tracks the prices of critical metals, like lead, zing, and copper, one sees that

A. they have risen more slowly than the general rate of inflation. B. they have risen about as rapidly as the general rate of inflation. C. the prices have fallen, indicating that consumers have found other alternatives. D. the prices have fluctuated too wildly to conclude anything.