You have a System Center 2012 R2 Configuration Manager Service Pack 1 (SP1) deployment that
contains 8,000 client computers.
When a custom application named App1.exe is installed on a computer, a registry value of
App1=TRUE is added to the registry. App1 is installed on approximately half of the computers.
You need to recommend a solution for creating a collection named Collection1 that contains only
computers on which App1.exe is installed. The solution must minimize administrative effort.
What should you include in the recommendation?

A.
a collection that has a direct membership rule

B.
a configuration item

C.
the custom client device settings

D.
a software category

Explanation:
Membership rule of the direct rule type let you choose the users or computers that you want to add
as members to a collection. This rule gives you direct control over which resources are members of
the collection. This membership does not change unless a resource is removed from Configuration
Manager. Configuration Manager must have discovered the resources or you must have imported
the resources before you can add them to a direct rule collection. Direct rule collections have a
higher administrative overhead than query rule collections because you must make changes to this
collection type manually.

How to Create Collections in Configuration Manager
https://technet.microsoft.com/en-us/library/gg712295.aspx