A relaxation of the criteria that need to be met does not mean an increase in the quantity of immigrants: it only means that those immigrants that do gain entry have less skills to contribute to the production process, decreasing AS
We debated over Q3 for like an hour. And we're still not 100% set on the answer. I've emailed the former Chief Examiner - hopefully he gets back to me with his thoughts soon.
I should mention, I went with C for Q3 as well, but the majority at Connect felt that D was more appropriate. It helps justify it if you think of it along these lines:
Obviously, A and B are good for AS. So we either need to identify an option that is unfavourable, or an option that is favourable.
Now, C talks about keeping people at school for longer; I don't think it's unreasonable to assume that VCAA would present this as a favourable option for AS - that is, if people stay at school for longer, they're more skilled and able to contribute more to AS. That seems to send a great message to students. If we follow this logic, then D must be the answer. And this can be justified based on the assumption that increases in unskilled migrants would not add to overall levels of AS.
Hope that made sense. I'll post up the comments from the former Examiner as soon as he replies.
Thanks for the feedback so far guys.