单选题
One disadvantage of alliances foreseen by the critics is that air travel may be moreexpensive as a result of
A、
less convenience.
B、
higher operation costs.
C、
less competition.
D、
more joint marketing.
【正确答案】
C
【答案解析】
第五段讲了结盟后可能会带来的问题，比如decreased flight choices and increased costs for consumers。因此，C项是正确答案。
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