When a Cisco router is being moved from an IPv4 network to a complete IPv6 environment, which series of commands would correctly enable IPv6 forwarding and interface addressing?

Question:
When a Cisco router is being moved from an IPv4 network to a complete IPv6 environment, which series of commands would correctly enable IPv6 forwarding and interface addressing?

• Router# configure terminal
  Router(config)# interface fastethernet 0/0
  Router(config-if)# ip address 192.168.1.254 255.255.255.0
  Router(config-if)# no shutdown
  Router(config-if)# exit
  Router(config)# ipv6 unicast-routing
• Router# configure terminal
  Router(config)# interface fastethernet 0/0
  Router(config-if)# ipv6 address 2001:db8:bced:1::9/64
  Router(config-if)# no shutdown
  Router(config-if)# exit
  Router(config)# ipv6 unicast-routing
• Router# configure terminal
  Router(config)# interface fastethernet 0/0
  Router(config-if)# ipv6 address 2001:db8:bced:1::9/64
  Router(config-if)# no shutdown
• Router# configure terminal
  Router(config)# interface fastethernet 0/0
  Router(config-if)# ip address 2001:db8:bced:1::9/64
  Router(config-if)# ip address 192.168.1.254 255.255.255.0
  Router(config-if)# no shutdown

Exam with this question: CCNA 1 (v5.1 + v6.0) Chapter 8 Exam Answers