Group C: Denmark-France, Australia-Peru. France has already qualified, and Denmark only needs a draw. If Denmark wins or draws, the other match doesn't matter. Peru is already out, but they have a decent chance of beating Australia. In other words, I think France and Denmark are advancing from this group.
Group D: Nigeria-Argentina, Iceland-Croatia. Croatia is through, all the others have a chance, even Argentina, who have played so poorly. I suppose people are rooting for Iceland, and people are rooting against Argentina, but I want to see more of Argentina, so I am rooting for them. If they win and Croatia wins or draws, Argentina will advance. If Argentina and Iceland both win, goal differential will matter. If Nigeria beats Argentina, nothing else matters, and they will advance with Croatia.