You recently took the car to the mechanic to fix its engine. The mechanic had quoted you a total price for the work of $1000, and you had decided to go ahead with the work. Nevertheless, when you go to pick up the car he tells you that in order to complete the job he needs to buy another part adding about $200 extra to the cost of fixing the car. According to the cost-benefit rule you should pay the extra money to finish the job only if the benefits of using the car are greater or equal to
A. $200.
B. 0.
C. $1,200.
D. $1,000.
Answer: A
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