What is the correct way of associating a VRF instance to either a VLAN or an interface?

What is the correct way of associating a VRF instance to either a VLAN or an interface?
A . Switch(config)# interface <interface-ID> Switch(config-if)# vlan access <VLAN-ID> vrf attach <vrf-name>
B. Switch(config)# vlan <VLAN-ID> vrf attach < vrf-name >
C. Switch(config)# vlan <VLAN-ID> Switch(config-vlan-<VLAN-ID># vrf attach < vrf-name >
D. Switch(config)# vlan <VLAN-ID> vrf < vrf-name >

View Answer

Answer: C