Which solution meets these requirements?

An engineer must design a multitenant solution using Cisco 7709 switches. The solution must support separate routing instances, separate spanning tree domains, and separate firewalls for each tenant.

Which solution meets these requirements?
A . vPC
B . VDC
C . CFS
D . VRF

Answer: B

Explanation:

Reference: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/VMDC/2-2/design_guide/vmdcDesign22/VMDC_2-2_DG_2.htm