Security policy requires that all administrative activity occurs through vCenter Server. Which action should a system administrator take to meet this requirement?
A. Use the vSphere client to right-click the cluster and enable lockdown mode on every host in the cluster at once
B. Use the vSphere client to navigate to the Security Profile of each host and enable lockdown mode on each host
C. Logon to the DCUI and navigate the menu to Troubleshooting Options and enable lockdown mode
D. Logon to the ESXi Shell and type the command service lockdown start
