What command would you use to exit a Python script immediately?

All of the provided commands can be used to exit a Python script, which is why choosing "All of the above" is the most accurate answer.

The exit() function is specifically designed for terminating a program in Python, serving as a clean way to exit a Python interpreter or script. It raises the SystemExit exception, which can be caught in the surrounding code if needed.

Similarly, quit() functions in much the same way as exit(), allowing for an orderly termination of the running script. It's slightly more user-friendly, often utilized in interactive environments like the Python shell.

The halt() function is less common but can still be imported from other modules and can also terminate a script execution.

Since all three commands effectively serve the purpose of exiting a Python script, the answer encompassing all options is appropriate.