經濟學的問題( 英文

我始終看不懂在說什麼 14) Mothers Against Drunk Drivers (MADD) campaigned to increase the legal penalties of drunk driving. This successful campaign ________ of drunk driving. A) increased the marginal benefit B) decreased the marginal benefit C) increased the marginal cost D) decreased the marginal cost E)... show more 我始終看不懂在說什麼

14) Mothers Against Drunk Drivers (MADD) campaigned to increase the legal penalties of drunk driving. This successful campaign ________ of drunk driving.
A) increased the marginal benefit
B) decreased the marginal benefit
C) increased the marginal cost
D) decreased the marginal cost
E) increased the sunk cost …

4) You have chosen to take a trip during Spring Break. If you had not gone, you would either have worked at a temporary job or studied for exams. The opportunity cost of your trip is
A) the wages you would have earned from working.
B) the lower grade earned by not studying.
C) the wages you would have earned from working and the lower grade earned by not studying.
D) the value of the trip.
E)We cannot determine what the opportunity cost is without knowing which alternative, working or studying, you would have preferred…..


請幫我大概翻譯一下題意跟選項

順便替我解答,感謝!
Update: Going skiing will cost Adam $80 a day. He also loses $40 per day in wages because he has to take time off from work. Adam still decides to go skiing.

A) His decision is rational if Adam's marginal benefit of spending a day skiing is greater than his marginal cost.
Update 2: B) The $80 price of skiing is a sunk cost and so did not affect Adam's decision.
Update 3: C)He loses a total of $120 per day, so his decision is irrational.
Update 4: D) Adam's lost $40 per day in wages is a sunk cost and so did not affect his decision.
E) Adam is definitely making a decision that is in the social interest.
Update 5: 可以給我你的及時通媽Q___Q

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