段4：①Railroads justify rate discrimination against captive shippers on the grounds that in the long run it reduces everyone’s cost. ②If railroads charged all customers the same average rate, they argue, shippers who have the option of switching to trucks or other forms of transportation would do so, leaving remaining customers to shoulder the cost of keeping up the line. ③It’s a theory to which many economists subscribe, but in practice it often leaves railroads in the position of determining which companies will flourish and which will fail. ④ “Do we really want railroads to be the arbiters of who wins and who loses in the marketplace?” asks Martin Bercovici, a Washington lawyer who frequently represents shippers.
54. The word “arbiters” (Para. 4) most probably refers to those
[A] who work as coordinators.
[B] who function as judges.
[C] who supervise transactions.
[D] who determine the price.
答案：B
问：第54题B选项对应原文中的什么信息？
A : in the position of determining
B : justify rate discrimination against captive shippers
C : leaving remaining customers to shoulder the cost of keeping up the line
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