Which two functions are performed by the DR in OSPF?

Which two functions are performed by the DR in OSPF? (Choose two.)

A.
The DR originates the network LSA on behalf of the network.

B.
The DR is responsible for the flooding throughout one OSPF area.

C.
The DR forms adjacencies with all other OSPF routers on the network, in order to synchronize
the LSDB across the adjacencies.

D.
The DR is responsible for originating the type 4 LSAs into one area.