I believe the answer is d the credit mobilier conspiracy
Answer: Providing supplies to American and Allied troops fighting the war in Europe, Africa, and the Pacific required the efforts of all Americans. At home, citizens contributed to the war effort by rationing consumer goods, recycling materials, purchasing war bonds, and working in war industries. We still help providing supplies to our allies, we try to recycle, and when things are in short supply we ration to help things last longer.
War and violence. While epidemic disease was by far the leading cause of the population decline of the American indigenous peoples after 1492, there were other contributing factors, all of them related to European contact and colonization. One of these factors was warfare.
The answer would be B) the Roman Empire, since they were the ones who established it, and the mongols came after the silk roads construction, alexander the great lived before the silk road, and many local governments also encompasses the romana
