Look, our government's far from perfect (like, really REALLY far from perfect), but the ACCC are solid. They're the ones that got Steam to accept refunds, and force ebay to allow payment methods other than paypal (which is owned by ebay). Despite our current government doing their best to fuck up everything and everyone, we enjoy strong consumer protections, and in some cases that's been to the benefit of the rest of the world. So, frankly, Google can go fuck itself, as far as I'm concerned. They keep styling themselves as an NGO while getting their tentacles into absolutely everything, consent be damned. I don't trust them as far as I can throw them (which has been the case for years), the Australian federal government are a bunch of incompetent corrupt shitbags, but the ACCC I trust.

Yes, it will be exactly the same as when the student looked at it. All you have to do is click the "history" tab at the top of the article, then select the version that was latest at the date the student referenced the article. That doesn't deal with what time the article was accessed vs when it was last edited, but it's still fairly good.

People forget that while "any Tom Dick or Harry can edit Wikipedia" they can't actually change anything, only add to it. Everything that ever was - and every version of it - is still there and accessible (apart from deleted articles, i think).