Which command enables OSPF for IPv6 on a router?

You have been tasked with setting up OSPF on an existing company router usingIPv6.
Which command enables OSPF for IPv6 on a router?

A.
ipv6 router ospf process-id

B.
router ospf process-id

C.
router ospf ipv6 process-id

D.
ipv6 ospf process-id area-id

E.
None of the above

Explanation:
To enable Open Shortest Path First (OSPF) for IPv6 router configuration mode, use the ipv6
router ospf command in global configuration mode.
ipv6 router ospf process-id
Syntax Description

Reference:
http://www.cisco.com/en/US/products/ps6922/products_command_reference_chapter09186
a00801d6615.html#wp2027608