微观经济学1.Which of the following is NOT a factor of production?

微观经济学
1.Which of the following is NOT a factor of production?
A) the water used to cool a nuclear power plant.
B) the effort of farmers raising cattle.
C) the wages paid to workers.
D) the management skill of a small business owner.
2.Which of the following is a positive statement?
A) The government must lower the price of a pizza so that more students can afford to buy it.
B) The best level of taxation is zero percent because then people get to keep everything they earn.
C) My economics class should last for two terms because it is my favorite class.
D) An increase in tuition will cause fewer students to apply to college.
3.Suppose that for the past two months,you have studied economics one hour a day.You now decide to study economics two hours a day.For the past two months,____.
A) your marginal cost of studying economics for an hour must have exceeded its marginal benefit
B) the marginal cost of studying economics must have fallen
C) your marginal benefit from studying economics an hour must have been greater than its marginal cost
D) the opportunity cost of studying economics must have risen.

A) the water used to cool a nuclear power plant.
D) An increase in tuition will cause fewer students to apply to college.
C) your marginal benefit from studying economics an hour must have been greater than its marginal cost