The correct answer is - trade.
The Sumerians engaged in trade with their move of exchanging their surplus food for materials like the copper that they needed to develop their weapons and thus their army forces. This was a very smart move from their side because they managed to use the resource they had in abundance but was scarce in the other surrounding areas so that they take what they need to become stronger and pretty much defend more efficiently from the same people they were engaging in trade with.
<span>The correct answer is D) Immigration was huge during the gilded age. What is the Gilded age? It's from the history of the United States, and it's a period from the late 19th century, from the 1870s to about 1900. The term that the period got came into use in the 1920s and 1930s.</span>
D, because the answer is in the question : "a statistic is given that says how many boxcars could be filled with the garbage is dumped into earth's water..."
I feel like “The voyages were risky, and there was no insurance to cover the risk” is the answer. Investors didn’t want to lose money and the only way that they would somehow break even on the cost would be if the voyage found riches.
The main reason why the North needed to maintain control of the border states during the Civil War was because "(B) President Lincoln needed the region’s political support to maintain <span>the presidency," since these states remained loyal to the Union but were not necessarily "free states". </span>
