Which add prefix does OSPFv3 use when multiple IPv6 address are configured on a single interface?

Question:
Which add prefix does OSPFv3 use when multiple IPv6 address are configured on a single interface?

• all prefix on the interface
• the prefix that the administrator configure for OSPFv3 use
• the lowest prefix on the interface
• the highest prefix on the interface

Explanation: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/ip6-routeospfv3.html#GUID-05F3F09C-FE3E-41D6-9845-111FB17AD030
“In IPv6, you can configure many address prefixes on an interface. In OSPFv3, all address prefixes on an
interface are included by default. You cannot select some address prefixes to be imported into OSPFv3;
either all address prefixes on an interface are imported, or no address prefixes on an interface are imported.”

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