单项选择题

The word "arbiters" (Paragraph 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
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单项选择题
According to the text, the cost increase in the rail industry is mainiy caused by ________.
A．the continuing acquisition
B．the growing traffic
C．the cheering Wall Street
D．the shrinking market
单项选择题
It can be inferred from paragraph 3 that ________.
A．shippers will be charged less without a rival railroad
B．there will soon Le only one railroad company nationwide
C．overcharged shippers are unlikely to appeal for rate relief
D．a government board ensures fair play in railway business
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