You have a deployment of Microsoft System Center 2012 R2 Configuration Manager that was migrated from Configuration Manager 2007 R2.
You have a Windows Installer (MSI) package for an application named App1. App1 is deployed to several client computers by using Configuration Manager 2007
R2.

You plan to create a configuration item to modify a registry entry that was created during the installation of App1.
You need to identify which detection method must be used for the configuration item.
What is the best detection method to identify? More than one answer choice may achieve the goal. Select the BEST answer.

A.
Use Windows Installer detection.

B.
Always assume application is installed.

C.
Use a custom script to detect this application,

D.
Detect a specific application and deployment type.