求助各位大神一道sc题

zhw1998

Dressed as a man and using the name Robert Shurtleff, Deborah Sampson, the first woman to draw a solider’s pension, joined the Continental Army in 1782 at the age of 22, was injured three times, and was discharged in 1783 because she had become too ill to serve.


答案说原句是正确的

而我选的错误答案是
22，injured three times，and was discharged in 1783 because she was

求问为什么呀

长丝弓

GmatLa的大神是这样分析的：
A选项：Correct. 本选项在语法和逻辑上均是正确的。由于joined..., was injured..., and was discharged....三者分别描述了三方面的信息，所以三者必须用并列连词and连接，不能用互相修饰的方式连接。只有本选项符合要求。

B选项：while being discharged in 1783是伴随状语，需将其和前句保证并列关系。

C选项：当三者并列时，应只在最后一个并列对象前添加and，即，用A, B, and C。本选项中第一个and多余，应改为逗号。

D选项：动词并列，injured应该用被动，前要补出was才能与joined和was discharged并列。

E选项：本选项用了having been injured…and discharged做join的伴随状语，但在逻辑上三者应保持并列。