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Which underground canals of the Iranian plateau fell into disrepair after the Mongol campaigns?

AQanats
BNorias
CGers
DYams
Answer & Solution
Correct answer: A. Qanats
1. Instability stopped their maintenance. 2. The qanats fell into disrepair. 3. The desert crept into Khurasan. _Source: syllabus Themes in World History, Theme 5, Nomadic Empires._
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