Garbage collection also known as automatic memory management, is the automatic recycling of dynamically allocated memory.
Garbage collection is performed by a garbage collector which recycles memory that it can prove will never be used again.
Systems and languages which use garbage collection can be described as garbage-collected.
As long as address space is available in the memory, the runtime continues to allocate space for new objects.
However, memory is not infinite. Eventually the garbage collector must perform a collection in order to free some memory.
The garbage collector's optimizing engine determines the best time to perform a collection, based upon the allocations being made.
So, option B is correct.
Unreferenced dynamically allocated memory is added back to free space.
