NEED ACCURATE ANSWERES TO THESE MACROECONOMIC QUESTIONS:

21. An undergraduate student pays $475 for a three-credit course at Pace University. After the official withdrawal date has elapsed, he drops the course (and cannot get back the $475). At this time, the $475 represents

a. An expenditure made on the margin

b. The benefit of gaining some knowledge from the course partially attended

c. A sunk cost

d. The opportunity cost of the course

22. "Lower ticket prices would lead to more people attending ball games." This statement is

a. A ceteris paribus assertion

b. A normative statement

c. A macroeconomic statement

d. A positive statement

23. Encouraging international trade will

a. Speed economic growth as workers diversify their knowledge and limit trade

b. Slow economic growth as many workers lose their jobs to froeign workers

c. Speed economic growth as workers specialize the trade with others

d. Slow economic growth when a country is forced to specialize and trade with other countries

24. If the government increases unemployment benefits, then labor

a. Demand curve shifts leftward

b. Supply curve shifts leftward

c. Supply curve shifts rightward

d. Demand curve shifts rightward

25. As technology advances

a. A country moves toward the midpoint along its PPF

b. All opportunity costs increase

c. The PPF shifts outward

d. All opportunity cost decreases

26. If a country is operating at a point of production efficiency

a. It must specialize in the production of a good

b. It enjoys growth when increasing production

c. It cannot be producing at its point of comparative advantage

d. It produces on its production possibility frontier curve

27. To help unscramble cause and effect, economists

a. Answer the "what, how and for whom" questions

b. Use the concept of opportunity cost

c. Answer the "why" question

d. Must use the ceteris paribus assumption

28. Consider the market for turkeys. In the US, because of Thanksgiving in the month of November

a. There is an upward movement along the supply curve for turkeys

b. There is a downward movement along the demand curve for turkeys

c. The supply curve of turkeys shifts leftward

d. The demand curve for turkeys shifts leftward

29. An efficient market is a market

a. In which the profits are always very high and persistent

b. In which opportunity costs are zero

c. In which profit opportunities are eliminated almost instantaneously

d. That is always in equilibrium

30. Which of the following is a positive statement?

a. There should be no unemployment in an advanced industrial society

b. People should pollute as little as possible

c. Consumption should be distributed fairly in society

d. Higher prices cause consumers to purchase less