Refer to the exhibit.
The core routing switches will run OSPF. Which design provides the best failover and resiliency?
A. One VLAN that extends across all the switch-to-switch links and a/24 subnet
B. Two VLANs that extend all the switch-to-switch links and a/24 subnet for each VLAN
C. A dedicated VLAN on each switch-to-switch link and a/30 subnet for each VLAN
D. One VLAN that extends across all the switch-to-switch links and a/30 subnet