Refer to the exhibit.
The network administrator wants to reduce failover time if a switch link in VLAN 100 goes down. What should the administrator do?
A. Configure echo mode BFD on VLAN 100 on all OSPF routing devices on VLAN 100.
B. Lower the dead timer on the BDR of VLAN 100.
C. Lower the hello timer only on the BDR of VLAN 100.
D. Configure graceful restart on all of the OSPF routing devices on VLAN 100.