【单选题】

Gaining a new customer costs ______ keeping an old one.
A．as many as five times

B．five times as many as
C．as much as five times
D．five times as much as

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根据网考网移动考试中心的统计，该试题：

11%的考友选择了A选项

4%的考友选择了B选项

1%的考友选择了C选项

84%的考友选择了D选项

Gaining a new customer costs ______ keeping an old one.A．as many as five times