Considering the architectural uniformity across distant Harappan sites, such as Dholavira and Mohenjodaro, what does this suggest about the civilization’s governance and economic structure?

1. A highly centralized authority that dictated urban planning across all regions.
2. Local rulers who adhered to a general cultural blueprint while managing local affairs.
3. Frequent communication and coordination between cities through organized trade networks.
4. Military dominance that enforced uniformity in construction techniques.