What is the purpose of the Data Link Layer in the OSI model?

What is the purpose of the Data Link Layer in the OSI model?
A . The Data Link Layer is responsible for encapsulating the packet into a frame for transmission on the transmission media.
B . The Data Link Layer is responsible for encapsulating the packet into an IP header and routing the packet.
C . The Data Link Layer is responsible for formatting the packet for applications such as JPEG format.
D . The Data Link Layer is responsible for timing of the signals on the transmission media

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Answer: A