Answer:
B. bricks were used in buildings,
D. they had sanitation systems
E. they were planned in advance
Step-by-step explanation:
The towns of the Indus Valley Civilization are considered the first examples of urban planning in human history. Drainage systems and residential areas are very well developed in these cities. This trend holds true for all locations explored to date. All of the bricks used in the construction of the homes were baked and standard in size.