After completing the configuration on switch SWA, PCA, PCB, and PCC can all ping their own gateways. Which of the following is correct about switch SWA port Ethernet1/0/4?

In the network shown in the figure, switch SWA is a layer 2 switch, and router RTA is the gateway of each PC. The following configuration is made on router RTA:

[RTA] interface Ethernet 0/0.1

[RTA-Ethernet0/0.1] ip address 10.10.10.1 255.255.255.0

[RTA-Ethernet0/0.1] vlan-type dotlq vid 1

[RTA-Ethernet0/0.1] interface ethernet 0/0.2

[RTA-Ethernet0/0.2] ip address 20.20.20.1 255.255.255.0

[RTA-Ethernet0/0.2] vlan-type dotlq vid 2

[RTA-Ethernet0/0.2] interface ethernet 0/0.3

[RTA-Ethernet0/0.3] ip address 30.30.30.1 255.255.255.0

[RTA-Ethernet0/0.3] vlan-type dotlq vid 3

After completing the configuration on switch SWA, PCA, PCB, and PCC can all ping their own gateways. Which of the following is correct about switch SWA port Ethernet1/0/4?

A . interfaceEthernet1/0/4 port link-mode bridge port link-type trunk
Port trunk permit vlan all
B . interfaceEthernet1/0/4 port link-mode bridge port link-type trunk
Port trunk permit vlan all port trunk pvid vlan 2
C . interface Ethernet1/0/4 port link-mode bridge port link-type trunk
Port trunk permit vlan all port trunk pvid vlan 3
D . interface Ethernet 1/0/4 port link-mode bridge port link-type trunk
Port trunk permit vlan all port trunk pvid vlan 10

Answer: A