The most important reason for the collapse of Rome was the failure to actually integrate what they conquered. When Roman soldiers conquered new lands, it was rare that they ever attempted to force their culture, ideals, or laws upon the natives and barbarians. Thus, when the Empire began suffering internal struggles, the natives they had conquered decided to take action, which lead to the swift collapse by barbarian invasion from all sides. It's hard to pick a LEAST important reason, seeing that there were many of them, but I suppose a contender would most likely be the common refusal of the Empire to even acknowledge that barbarians were rising. On the outer edges of their territory, in places like Gaul and Morocco, the Roman government was reluctant to even recognize the threat of the barbarians, thinking that even accepting that these barbarians were causing trouble would weaken their prestige in the public eye.
Option D is the right answer.
The Montgomery Bus Boycott was a major success of the Civil Rights movement. This boycott was a social and political protest campaign against the doctrine of racial discrimination in public transportation. The boycott began when an African- American lady was imprisoned for denying to quit her chair to a White man. And this protest resulted in the Supreme Court's verdict that claimed the Montgomery and Alabama laws that segregated buses were illegal.
Meriwether Lewis and William Clark are best known for their expedition from the Mississippi River to the West Coast and back. The expedition, called the Corps of Discovery, was President Thomas Jefferson's visionary project to explore the American West. It began in May of 1804 and ended in September 1806.
Reconstruction is largely seen as a failure, and many historians believe this was primarily because the South for so long had been dependent on slaves that in one swift motion the South's entire livelihood shifted. This dramatic shift was too much for the Southerners to absorb at once, and harsh Jim Crow laws sprang up.
