Which of these factors can explain the short recession experienced by the U.S. in 2001?

U.S. bank notes have no intrinsic value and yet are widely accepted as a medium of exchange. This is a result of:

a. Gresham's law. b. the use of money as a store of value. c. the fiduciary monetary system. d. the valuation of currency as commodity money. e. the gold and silver reserves of the Federal government that backs the currency.

The marginal rate of substitution is the slope of the indifference curve

a. True b. False Indicate whether the statement is true or false