Answer:
C. Canal systems allowed the Kushan Empire to increase its amount of arable land.
Canal systems were the engineering system that allowed the Kushan Empire to increase its amount of arable land. Canals are artificial waterways that were used to transport water to agricultural fields. By constructing canals, the Kushan Empire was able to divert water from rivers and lakes to areas that were previously dry or had limited access to water. This irrigation system helped to increase the amount of arable land available for farming.
Step-by-step explanation:
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