Referring to the exhibit, which statement is true about the LDP Layer 2 circuit?

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A LDP Layer 2 circuit is shown for VPN A and VPN B. LDP tunneling over RSVP is activated on P1 and P2.

Referring to the exhibit, which statement is true about the LDP Layer 2 circuit?
A . MAC learning is needed and using the inner VPN label between PE1 and PE2 for VPN A or VPN
C . Targeted LDP sessions are established between PE1, P1 and P2, PE2.
D . Label stitching must be configured on P1 and P2 for end to end transport LSPs.
E . LDP must be enabled on the loopback interfaces of PE1 and PE2.

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Answer: D