Doesn't at all matter what you pick and what evidence you use, so long as you ace the presentation.
I hardly did any research, but rather just played to what I already knew. In 2010 I studied Geog 3/4 and subsequently knew a lot about the Murray Darling Basin, and in the subject you are required to understand conflicts and the contending parties and their motives in the MDB, so I just argued for one one side over the controversy of the North South Pipeline.
That might mean nothing to you, but all I'm saying is go by what you know. Did you do a 3/4 previously? What do you know about it that is slightly controversial? Find an argument which you already have studied and just present on that.
The more you know it, the less you have to rehearse it and the more it will flow.
IMO just play to you're strengths and argue your oral like a debater; don't be convoluted with your language and just be simple, clear, and concise. Don't come across as pretentious - come across as genuine, and talk casually with your audience as though you would a friend. Leave out the colloquial language, though, like 'like' etc.
Scored me full marks in the Oral this year. Best of luck!
I'm thinking QANTAS spent forever doing it for business man this year anyways
Exactly! You already know all about it, so present your argument on it, and it will flow much easier than if you picked a topic that you were less familiar with.