Prep 171 代词问题

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171
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,

其他选项都明白排除点了，就是不理解正确选项C中it指代radio这点。逻辑上确实it是指radio，但是为何没有就近指代telephone的歧义呢？而且两个分句也不是主从句，radio也不是第一个句子的主语。离得如此远，为何可以这样指代呢？

求NN们指点！！！

bejamin1111

不排除有指代telephone 的嫌疑，但是句子逻辑清楚，manhattan也说了，轻度的pronoun ambiguity是允许的

kiwifoodtown

我只能说，请注意分号的使用，分号前后两个句子相对独立，所以后一句的作主语的代词显然指代前一句的主语或核心名词，这里it显然不能指代人名Marconi，那么就应该优先指代核心词the radio。