Vivien Thomas, who had no formal medical training, in struggling against overwhelming odds, he became a cardiac surgeon and eventually to receive an honorary doctorate from Johns Hopkins University.

A、who had no formal medical training, in struggling against overwhelming odds, he became
B、having had no formal medical training, in struggling against overwhelming odds to become
C、who, having no formal medical training, he struggled against overwhelming odds in becoming
D、who, having had no formal medical training and struggled against overwhelming odds, became
E、who had no formal medical training, struggled against overwhelming odds to become

答案：E

专业教师答疑

问题：请问老师，d选项的having had 和 struggled都看成主动的have done作状语并列为啥不行查看答疑

问题：看不出来E比其它选项好在哪里了，排除BCD是因为having么？查看答疑

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