求解GWD-TN-8 第一题语法

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GWD-10-Q1.
According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

A.    minority graduates are nearly four times more likely than are other graduates in planning to practice
B.    minority graduates are nearly four times more likely than other graduates who plan on practicing
C.    minority graduates are nearly four times as likely as other graduates to plan on practicing
D.    it is nearly four times more likely that minority graduates rather than other graduates will plan to practice
E.    it is nearly four times as likely for minority graduates than other graduates to plan to practice


答案选C 没有解释B  
为什么B不行呢？？ 原文是多了4倍的可能，也就是 5倍 ，  而C是 4倍， 不是改变原意了吗？
B错在哪里了呢？？

跪求指教！！

糊涂的小黑

be likely to do sth

泡泡水格

see~~谢谢！！！