You need to add VLAN 4 to the allowed list on a trunk interface. Currently VLANs 5 through 8 are allowed. Which command will add only this VLAN without interruption to the network?

The command switchport trunk allowed vlan add 4 will add VLAN 4 to the existing list of VLANs already allowed on the interface. The commands add allowed vlan 4, switchport trunk add vlan 4, and switchport trunk allowed add vlan 4 are incorrect.