What is the impact of complex VPN topologies such as Central Services VPN on the VRF tables in the PErouters?

What is the impact of complex VPN topologies such as Central Services VPN on the VRF tables in
the PErouters?

A.
Complex VPN topologies might require more than one VRF per VPN.

B.
Complex VPN topologies might require more that one VRF per interface.

C.
Complex VPN topologies might require the use of multiple routing protocols to separate VPN
address
spaces.

D.
Complex VPN topologies might require the use of the public address space to ensure there is
no overlap in the address spaces.

Explanation:
Not D: D is incorrect. In the same VPN, no matter complex or not, there should not be overlapping
address.
Does public address solve this problem?Probably, but you need to plan in advance (buy these
addresses then use them), the same can be achieved with private addresses if you DO plan in
advance.