Final answer:
Global replacement allows a process to select a replacement frame from the set of all frames, even if the frame is currently allocated to some other process.
Step-by-step explanation:
The correct answer is c) Global.
Global replacement allows a process to select a replacement frame from the set of all frames, even if the frame is currently allocated to some other process. This means that a process can replace a frame that is being used by another process.
For example, imagine a computer system with multiple processes running simultaneously. If one process needs more memory and there are no free frames available, it can use global replacement to select a frame that is currently being used by another process, and replace its contents with its own data.