By the end of the 19th century, bituminous coal still was the largest single source of mineral energy used in this country, despite the enormous increase in oil production and refining

The period during which real output falls during a business cycle is called:

a. peak. b. recession. c. recovery. d. trough.

It is true that the distribution process carried out by the price system

a. accomplishes the task more efficiently than central planners would. b. favors the rich. c. is superior to other rationing mechanisms because it is able to pay attention to individual consumer preferences. d. All of the above are true.