You have configured an IPSec-over-GRE tunnel to a non-Juniper router with different IPSec and GRE endpoints. The tunnel interface is gr-0/0/0.0, the inside service interface is sp-0/0/0.2, and the outside service interface is sp-0/0/0.1. How do you enable OSPF in area 0 for this tunnel?

A.
set protocols ospf area 0 interface sp-0/0/0.1

B.
set protocols ospf area 0 interface gr-0/0/0.0

C.
set protocols ospf area 0 interface sp-0/0/0.0

D.
set protocols ospf area 0 interface sp-0/0/0.2