Which steps should an administrator perform to run an upgrade pre-check for multiple Windows and Linux clients using VxUpdate, without performing the upgrade?

A. run a pre-check for each client manually using the nbinstallcmd command

B. configure the pre-check to run for all clients concurrently in Deployment Policies > Schedules

C. run a pre-check for each client manually using the nbrepo command
D. configure the pre-check to run for all clients concurrently in Deployment Policies > Attributes