Question: Data Link Layer communicates between NICs and can deliver pkt , why do we still need the network layer when data link layer already has

Data Link Layer communicates between NICs and can deliver pkt, why do we still need the network layer when data link layer already has the capability to deliver data pkts.
A because we can afford to do so
B because data link layer is not for data transmission
C because data link layer only can not help us to form a big network
(D) because data link layer is not stable

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