If there's a huge increase in the number of Americans travelling to Europe (say, for the Olympics), then the effect on the foreign exchange market is that the:

________ uses the concept of marginal analysis to determine the optimum choice

A) Optimization in margins B) Optimization in levels C) Optimization in markets D) Optimization in differences

The Federal personal income tax:

A. Has a regressive structure B. Is actually less progressive than official tax schedules would indicate because of various tax exemptions and deductions C. Has become extremely progressive as a result of taxpayers' being pushed into higher tax brackets by higher income levels D. Has experienced substantial increases in rates during the past two years