单项选择题

The word "arbiters" ( Line 6, Para. 4) most probably refer 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 passage, the cost increase in the rail industry is mainly caused by ______.
A．the continuing acquisition
B．the growing traffic
C．the cheering Wall Street
D．the shrinking market
单项选择题
According to those who support mergers, railway monopoly is unlikely because ______.
A．cost reduction is based on competition
B．services call for cross-trade coordination
C．outside competitors will continue to exist
D．shippers will have the railway by the throat
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