medium · LSAT Reading Comprehension
Recent archaeological findings in the Andean highlands have revealed complex irrigation systems dating back to 500 BCE. These systems utilized a series of terraced canals that diverted glacial meltwater. The presence of such infrastructure suggests a level of social stratification and centralized labor management previously thought to have emerged centuries later in this region.
According to the passage, the irrigation systems found in the Andean highlands are significant because they
- Were built by a centralized government that controlled all labor in the Andean region.
- Point to organized social and labor structures arising earlier than scholars had previously assumed.
- Demonstrated that terraced canal systems are the most efficient way to manage water in highland environments.
- Provided the first definitive proof that glacial meltwater was used for agriculture in ancient times.
- Show that complex engineering can develop without any form of coordinated labor.
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