Refer to the exhibit. Two new switches are being installed. The remote monitoring team uses the support network to monitor both switches. Which configuration is the next step to establish a Layer 2 connection between the two PCs?
A. SwitchA(config)#interface GigabitEthernet0/1
SwitchA(config-if)#switchport access vlan 500
SwitchB(config)#interface GigabitEthernet0/1
SwitchB(config-if)#switchport access vlan 500
B. SwitchA(config)#interface GigabitEthernet0/1
SwitchA(config-if)#switchport mode trunk
SwitchB(config)#interface GigabitEthernet0/1
SwitchB(config-if)#switchport mode trunk
C. SwitchA(config)#interface GigabitEthernet0/0
SwitchA(config-if)#switchport trunk allowed vlan 500, 550
SwitchB(config)#interface GigabitEthernet0/0
SwitchB(config-if)#switchport trunk allowed vlan 500, 550
D. SwitchA(config)#interface GigabitEthernet0/0
SwitchA(config-if)#spanning-tree portfast
SwitchA(config-if)#spanning-tree bpduguard enable
SwitchB(config)#interface GigabitEthernet0/0
SwitchB(config-if)#spanning-tree portfast
SwitchB(config-if)#spanning-tree bpduguard enable