Due to a long-term shift toward remote and hybrid work patterns, major corporations in a metropolitan area have scaled back their leased spaces, resulting in a significant drop in demand for commercial office space. Simultaneously, local government initiatives have permanently reallocated a substantial portion of commercial office districts to public parks and residential zones, severely restricting the supply of commercial space.

Which one of the following diagrams, A, B, C or D, best illustrates these changes in the metropolitan commercial office space market?