The Incas built a large system of roads that went throughout their empire, Commoners were not allowed to travel on the roads. Communication was accomplished by runners on the roads.
I think the answer is C because slavery started to slow in other places.
The Aztecs built their settlement in a swamp in what is now Mexico City and when the Spanish arrived they thought it more spectacular than Venice. The Aztecs were fantastic warriors but they were also excellent farmers: because they had stumbled on hydroponics, their floating fields produced an abundance of nutrients in the food they were growing.
The Mayas built some of the tallest buildings of the ancient world – without the use of the wheel, or even horses. The pyramid El Castillo in Chichen Itza is the Mayan calendar, literally set in stone.
<span>the Incas lived in the mountains of South America and had to cross very deep ravines they invented the world's first suspension bridges in spite not having hemp or sisal ropes. They made their bridges out of twisted fibers of long stemmed grass, another amazing feat of ingenuity from an inspired region.</span>
<span>Hope this help :)..........my hand hurts.</span>
<span>In his clearly titled Water and American Government Donald J. Pisani continues his planned multivolume analysis of water law, water policy, and American governmental institutions.[1]
This second volume offers a narrative history of the Reclamation Service from its creation by the Reclamation Act of 1902 through its monumental, crowning achievement in the first third of the twentieth century, Boulder Dam on the Colorado River.</span>
