I did Q27 because I looked at 28 and completely blanked out in regards to industrial disputes. I liked 27 because I could manipulate it a lot and I had a similar question in my trial exam.
I talked about the basic rights of employers (duty to provide agreed remuneration etc) and talked about ethical issues which employers were increasingly responsible for (anti-discrim, OH&S, unfair dismissal etc). I then talked about communications sytems: grievance procedures, worker participation, team briefings and some other random ones and linked that to managing change effectively. I also discussed nature and sources of change, resisters to change, and ethical change - with ethical change, I talked about how communication systems could manage things like globalisation, cultural diversity and quality of working life. I added in a few more bits and pieces, but overall I really liked the question.