Which of the following would not be studied in microeconomics（）
A. Whether to study or watch TV tonight
B. How individual firms decide how much to produce
C. How an early freeze in California will affect the price of fruit
D. Whether the federal budget should be balanced
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If a person takes an action if, and only if, the extra benefits from taking that action exceed the extra costs, then that person is（）
A. not rational
B. following the Cost-Benefit Principle
C. following the Scarcity Principle
D. not following the Cost-Benefit Principle
The Cost-Benefit Principle（）
A. provides an abstract model of how people should choose between alternatives
B. provides little insight into how people actually chose between alternatives
C. fully captures how people choose between alternatives
D. describes how people behave once they have enough education
The extra benefit that results from carrying out one additional unit of an activity is the__ of the activity（）
A. average benefit
B. marginal benefit
C. economic benefit
D. total benefit
The fact that most people make some decisions based on intuition rather than calculation is（）
A. consistent with the cost-benefit model because calculating costs and benefits is irrational
B. inconsistent with the cost-benefit model, but still rational
C. consistent with the cost-benefit model because most people intuitively weigh costs and benefits
D. irrational, because intuition is usually wrong
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