【单选题】
Which set of commands is recommended to prevent the use of a hub in the access layer?（）
A、switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1
B、switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1
C、switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1
D、switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1
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