Which plant house US, PB, and Maintenance?

The correct choice is 2000 because it designates the plant that encompasses the functions of Unit Supply, Property Book (PB), and Maintenance within the GCSS-Army system. In the context of unit logistics and support, the 2000 plant is specifically structured to facilitate the management and oversight of supply chain operations and maintenance activities.

Understanding the significance of the 2000 plant helps in grasping the overall logistics framework that military units operate within, ensuring that supply operations are synchronized with property accountability and maintenance efforts. Each of the other options represents different aspects or levels of the GCSS-Army ecosystem but does not provide the comprehensive integration of the supply, PB, and maintenance functions that the 2000 designation offers. This integration is crucial for effective resource management in military operations.