What is the most secure way to utilize the same script for user’s display name in the vRA request form?

A cloud architect is tasked with designing a Guest virtual machine (VM) request form for an organization’s new vRealize Automation (vRA) implementation. Its current PowerCLI VM request tool uses a PowerShell script that retrieves user IDs from Active Directory, which is the same identity source for vRealize Automation. The intent of the script is to retrieve and display John Smith when the actual value in Active Directory is JSmith01.

What is the most secure way to utilize the same script for user’s display name in the vRA request form?
A . Design a schedule vRealize Orchestrator workflow to execute the PowerShell Script and update the vRealize Automation drop-down custom property with static values.
B . Design a schedule vRealize Orchestrator (vRO) workflow to execute the PowerShell Script and store values in vRO, then utilize the vRA external drop-down to retrieve these values from vRO.
C . Design a display custom property in the vRA ‘Administration/Active Directory Policy’ that maps to the correct organizational unit.
D . Create a drop-down custom property with external values that returns a display name using the existing PowerShell script.

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Answer: D