Module choice

I’ve got to choose an optional module for my online MSc course, the options are forensic psychology, education psychology and psychology of health and illness. I’m finding it hard to decide as I’ve done an undergrad in childhood studies so essentially I’ve done 3 years of education related psychology, I also work in a school. I thought choosing that module would be easier for me however I plan on hopefully doing a doctorate in clinical psychology in a few years time and heard that sticking to what I know would probably be a bad idea as they may think I don’t branch out of my comfort zone. I want to do something that’s interesting and whilst they all are in their own way, I’m just not sure which would be the better module to choose. Any advice?