How many VRF tables are needed to support three VPNs (Customer A, Customer B, and a VoIP VPN) wit the requirements?

Network topology Exhibit

Exhibit #2, Requirements

How many VRF tables are needed to support three VPNs (Customer A, Customer B, and a VoIP VPN) wit the requirements?

A.
1 VRF

B.
3 VRFs

C.
4 VRFs

D.
5 VRFs

E.
7 VRFs