The correct statement is that Aztec built causeways to make travel by land to and from the city easier. So, the correct option is D.
Causeways made travel through the city hassle-free, and accident rates were also reduced after building such causeways.
Causeways
Causeways are such roads which are made at a slightly elevated heights to curb the problem of travelling roads having puddles and wet areas.
When Aztec built such causeways along with canals, the geographical structure was changed, enabling the transportation for trade and commute easier.
Hence, the correct option is D that the Aztec built causeways to make travel to and from the land route easier.
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