please help me with these question

31. Which of the following will not cause a movement along the supply curve?

a. Changes in the sellers' expectations.

b. Increases in taxes per unit of output.

c. Advances in technology.

d. All of these.

32. If the price of good X increases and this causes an increase in the demand for good Y, then

goods X and Y are substitute goods.

a. True

b. False

33. Suppose A and B are complementary goods. Other things being equal, the demand curve for

A will shift to the right when the price of B goes up.

a. True

b. False

34. If renting videos is an inferior good, demand for this service will rise when consumer income

falls.

a. True

b. False

35. An increase in demand is reflected as a rightward (outward) shift of the demand curve and is

caused by an increase in price.

a. True

b. False

36. In order for a price floor to have an impact on a market it must be set above the equilibrium

price.

a. True

b. False

37. Productive efficiency implies

a. The possibility of gains in one area without losses in another.

b. That more output has been produced.

c. The impossibility of gains in one area without losses in another.

d. That prices are stable.

e. c and d

38. A decrease in the quantity of resources available causes a movement down along a given

PPC.

a. True

b. False

39. Which of the following is an example of a negative externality?

a. Planting flowers in your front yard.

b. Talking loudly when others are trying to study economics.

c. People donating money to charity.

d. The price of bread increases.

e. Accidentally pushing someone as you try to cross the street.

40. Unintended costs that are imposed in third parties as a result of an economic activity are

called:

a. Marginal costs.

b. Direct costs.

c. Negative externalities.

d. Positive externalities.

e. Positive costs.