请教GWD9-Q41， 谢谢！

wangcaroline

Marconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is precisely the opposite, a tool for communicating with a large, public audience.

A.Marconi's conception of the radio was as a substitute for the telephone, a tool for private conversation; instead, it is
B.Marconi conceived of the radio as a substitute for the telephone, a tool for private conversation, but which is
C.Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become
D.Marconi conceived of the radio to be a tool for private conversation, a substitute for the telephone, which has become
E.Marconi conceived of the radio to be a substitute for the telephone, a tool for private conversation, other than what it is

The answer is E. 为什么C 不对阿？1）请教instead的用法 2）答案E中other than 后面的“what it is"的“what"指代什么呢？后面已经是一个很完整的句子了阿。
没有找到讨论帖，谢谢大家指点！

ANNYXU

答案是C， E太罗嗦了

糊涂的小黑

THAT这里不是代词。。。

miller811

顶

miller811

C.Marconi conceived of the radio as a tool for private conversation that could substitute for the telephone; instead, it has become

这里的that是否有修饰conversation的嫌疑呢？ 我因此排除了C    
求解～

wangcaroline

谢谢阿，看来我下载的版本答案有错。

aeoluseros

OA is C.