GWD 23 19请教

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,

答案是E, 我想问的是B, 除了那个 but which is 不好之外,  conceive as 的用法可以吗?