The transcontinental railroad helped to increase the speed at which coast to coast communication was possible. The railroad allowed for materials, people, goods, and messages to be transported more quickly from coast to coast increasing the pace of communication.
Answer:
Option: the Babylonians hated their king.
Explanation:
Babylonia flourishes and becomes the largest cities under the rule of Hammurabi. After Hammurabi's death, the empire was divided into small states. New rulers founded a Neo-Babylonian Empire that spread across the Persian Gulf to the Mediterranean. In 539 B.C., King Cyrus the Great or Cyrus II of Persia conquered Babylon.
Simple, the Americas had gold and silver. The Spaniards basically craved metals like those. Also because of the inquisition, they wanted to convert the natives to Christianity. Since the Spaniards were not a powerful economy at the time. The riches made their economy SKYROCKET.
They weren't so successful at conquering Europe or China. Of course, one can blame the long supply lines, but in these cases their adversaries were also determined to repulse them.
In contrast, Byzantium and Persia were exhausted from mutual warfare. Tribes related by kinship to Muslim Arabs had served as mercenaries during this period, so there was a lot of tactical knowledge available.
The Byzantines retreated to the highlands of Anatolia upon losing their lower-lying provinces to the Muslims. I am not sure if they launched a determined counter-attack. The Persians did, but they could not fight coherently.
I would go with c it is best supported
