A vSphere administrator has created a vSphere Standard Switch with one virtual machine port group and one physical uplin

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A vSphere administrator has created a vSphere Standard Switch with one virtual machine port group and one physical uplink. The administrator needs to ensure that the virtual machines on this port group can communicate only with each other.What should the administrator do?

A. Remove the physical uplink from the vSphere Standard Switch
B. Create a Private VLAN and apply it to the virtual machine port group on the vSphere Standard Switch
C. Enable Port Security on the vSphere Standard Switch
D. Enable the Fenced setting on the virtual machine port group