What's the term for the removal of deleted objects in Active Directory?

What's the term for the removal of deleted objects in Active Directory?

• Trash collection
• Garbage collection
• Bin removal
• Recycling 

EXPLANATION

 In computer science, garbage collection is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by objects that are no longer in use by the program. Garbage collection was invented by John McCarthy around 1959 to simplify manual memory management in Lisp.

Fundamentals of Garbage Collection: Describes how garbage collection works, how objects are allocated on the managed heap, and other core concepts. Garbage Collection and Performance: Describes the performance checks you can use to diagnose garbage collection and performance issues.