How does MPLS BGP VPN handle the problem of address overlapping of different VPN sites?

How does MPLS BGP VPN handle the problem of address overlapping of different VPN sites?
A . To use different routing protocols In the backbone network for afferent VP
C . To maintain separate VRF lor different VP
E . To allocate unique RT for each VP
G . To allocate different LSP for each VP
. To allocate unique RD for each VP

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Answer: A