I WILL NAME BRAINLIEST It is believed that the Indus civilization was very large because .
A.
they built a sophisticated road system
B.
the valley is in both India and Pakistan
C.
hundreds of miles separated major cities
D.
they constructed a widespread irrigation system

D.

Explanation:

b

Explanation:

Another possible reason for the fall of the Indus is a lack of resources. The Indus civilization had grown large, and they relied on the wood from the trees in the region.

answer; by working independently, the states have a high likelihood of developing innovative solutions that can be employed in other states;

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