Which one of the following design approaches or mechanisms would you suggest an organization using the routed access design model would need to deploy path isolation?

Which one of the following design approaches or mechanisms would you suggest an organization using the routed access design model would need to deploy path isolation?
A . Configure Layer 2 VLANs per virtual network at the access layer and configure a VRF per VLAN at the distribution layer.
B . Use GRE tunneling per virtual network. The tunnels should be built between the distribution switches.
C . Configure MPLS at the core and VRFs at the distribution layer.
D . Configure Layer 2 VLANs per virtual network at the access layer and map each VLAN to a VRF at the access layer. VRFs need to be defined across the path end to end with a subinterface per VR

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Answer: C