How should the FastEthernet0/1 port on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices?

Refer to the exhibit. How should the FastEthernet0/1 port on the 2950 model switches that are shown in the exhibit be configured to allow connectivity between all devices?

A.
The ports only need to be connected by a crossover cable.

B.
SwitchX(config)# interface FastEthernet 0/1
SwitchX(config-if)# switchport mode trunk

C.
SwitchX(config)# interface FastEthernet 0/1
SwitchX(config-if)# switchport mode access
SwitchX(config-if)# switchport access vlan 1

D.
SwitchX(config)# interface FastEthernet 0/1
SwitchX(config-if)# switchport mode trunk
SwitchX(config-if)# switchport trunk vlan 1
SwitchX(config-if)# switchport trunk vlan 10
SwitchX(config-if)# switchport trunk vlan 20

SwitchX(config-if)# switchport trunk vlan 20