How is authentication handled with OSPFv3?

How is authentication handled with OSPFv3?

A.
OSPFv3 for IPv6 authentication is supported by IPv6 IPsec.

B.
OSPFv3 for IPv6 authentication is supported by MD5 authentication.

C.
OSPFv3 for IPv6 authentication is supported by IPv4 IPsec.

D.
OSPFv3 for IPv6 authentication is supported by SHA-1 authentication.

Explanation:
http://www.cisco.com/en/US/docs/ios-xml/ios/iproute_ospf/configuration/xe-3s/ip6-route-ospfv3-auth-ipsec-xe.html