The answer is A.) Confederalism
Answer: While building the city Tenochtitlan on the islands of lake Texcoco, the Aztecs faced swampy lands with no foundations and soil that was bad for farming.
Explanation: Because the islands in lake texcoco did not have very solid ground, the Aztecs had trouble building their city. They overcame these challenges by building canals to reroute the water.
I do not have your choices of "the following" Here are some reasons I learned: Christianity, empire was too big and became hard to manage, there were many nonromans attacking parts of empire- Goths, the emperors themselves were weak or insane intrigue was rampant.
Terracing worked best in areas with large plains.
Terracing was so effective in ancient Athens that it produced enough food that it could be traded to other places.
The ancient Athenians used terracing to grow potatoes, corn, and squash.
Ancient Athens invented the practice of terracing.
I think the answer would be the Compromise of 1850 that led to sectional tensions and the formation of a new political party. It was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states regarding the status of territories acquired.
