What operation is performed by a P device on the label signaled by MP-BGP when it receives a labeled packet for a VPRN service?

What operation is performed by a P device on the label signaled by MP-BGP when it receives a labeled packet for a VPRN service?
A . It will label switch the packet based on this label
B. It will decrement the TTL and label switch the packet based on this label
C. It will SWAP the label for a new label and then label switch the packet
D. The P router does not perform any operation on this label

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Answer: D