Which configuration ensures that the switch is always the root for VLAN 750?
A . Switch(config)#spanning-tree vlan 750 priority 38003685
B . Switch(config)#spanning-tree vlan 750 root primary
C . Switch(config)#spanning-tree vlan 750 priority 614440
D . Switch(config)#spanning-tree vlan 750 priority 0
Answer: D