Option C (definitely see Beth Patterson) is the correct answer.
It is because the reservation price is the maximum possible price that an individual is willing to pay for a particular good or service. High reservation price means that the person is willing to pay more for that good than other goods.
Now, in this scenario Dorothy has free concert ticket voucher, it means that she can go to both the concerts for free. But Dorothy will choose the alternative which has higher reservation price as she is willing to pay more for that good or service, that means she desires more of that. Therefore, she will go in Beth Patterson's concert as its reservation price is high.
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Suppose rational decision-maker Dorothy has received a voucher for a free concert ticket that she can...