In the OSI reference model, the function of the network layer is mainly ______ .

 In the OSI reference model, the function of the network layer is mainly ______ .
A .  Transmit the original bit stream on the channel
B . Make sure that the pieces of information that arrive at the other party are correct
C .  Determine how the data packets are routed from the source to the destination
D .  Strengthen the function of transmitting the original bit stream in the physical layer, and control the flow

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Answer:   C