A customer is running OSPF on a broadcast network type in a DMVPN single-hub, single-cloud
topology and dynamically routes from the data center to the branch networks. The customer
wants to speed up convergence and to avoid having to elect DRs by changing the network type
to point-to-multipoint at the data center and to point-to-point at the branches. Which option
will meet the fast convergence requirement and not break any OSPF neighbor adjacencies
when this redesign is implemented?

A.
The OSPF area containing the branch office routers should be set to stubby.

B.
The OSPF neighbors should be set manually at the data center router.

C.
The OSPF hello and dead timers should be adjusted at the data center router to match the
timers at the remote sites.

D.
The OSPF database should be cleared manually for the new network types to take effect.

E.
The interface MTU sizes should be increased on all routers.