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 . Ensure that each piece of information reaching the other party is correct
C . Determine how data packets are routed from source to destination
D . Strengthen the function of transmitting raw bit streams of physical layer data and perform traffic control

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Answer: C