Enrolment

This has been asked before, but there was no answer and even after testing I still can't find exactly what these options mean.

In the manual enrollment options, you have 4 options to select from if your enrollment is expired:




However.... option 1 and option 2 seem to do exactly the same.

Option 3 removes a role, but... the result is also the same.

Option 4 is the only clear option: the user is removed from the course.

NB: this has also not been documented in Moodle docs anywhere?