Which configuration command is used to summarize networks advertised out of an OSPF area by an ABR?

Which configuration command is used to summarize networks advertised out of an OSPF area by
an ABR?

A.
network network-number wildcard mask area area-id

B.
summary-address address mask

C.
auto-summary address mask area area-id

D.
area area-id range address mask

Explanation: