I don't think it would, and I doubt there would be any potential for overlap between markers as I'm pretty sure you can't mark both Advanced and Extension. So it's highly unlikely that they would ever know, and if they did somehow realise, comparison of your student number would make it pretty clear that it wasn't plagiarism per se, just recycling.
If we do get creative though, I'm sure the stimulus will necessitate making at least some changes between your composition in Extension 1 and Mod C anyway, so there should be adequate differences to mitigate plagiarism claims, right? It's probably not the best idea to write a carbon copy of your Mod C from both a plagiarism and marks/question relevance perspective.