What are two reasons to use the ip ospf database filter all out command? (Choose two.)
A. to maintain a centralized OSPF database on a single master device
B. to avoid flooding LSAs on low-speed links
C. to ensure a consistent OSPF database across the network
D. to selectively filter OSPF routes without disrupting the SPF algorithm
E. to filter only type 7 LSAs from an OSPF area
F. to enable OSPF to send triggered updates
