What is the best approach to achieve the goal?

You have a System Center 2012 R2 Configuration Manager deployment.
All users have client computers that run Windows 8.1. The users log on to their client
computer as standard users.
An application named App1 is deployed to the client computers by using System Center.
You need to recommend a solution to validate a registry key used by App1. If the registry
key has an incorrect value, the value must be changed. The registry key must be validated
every day. The solution must generate a report on non-compliant computers.
What is the best approach to achieve the goal? More than one answer choice may achieve
the goal. Select the BEST answer.

A.
Group Policy preferences

B.
A desired configuration baseline

C.
The Windows PowerShell Desired State Configuration (DSC) feature

D.
The Microsoft Baseline Security Analyzer (MBSA)