On December 8, 1941, one day after the attack on Pearl Harbor, the United States declared war on Japan. This prompted Germany to declare war on the United States, which, in turn, led to the United States to declare war on Germany on December 11, 1941.
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.
Answer:
E.
Without political parties, electors would have to evaluate every individual candidate in every single election they are eligible to vote in. Instead, parties enable electors to make judgments about a few groups instead of a much larger number of individuals.
C. McColloch v. Maryland
The Supreme Court ruled that the bank was both constitutional and that as an agent of the federal government it could not be taxed
The three things that brought about the fall of Rome when they all hit at once are:
1. multiple civil wars
2. economic collapse due to inflation
3. repeated invasions from all over
Rome used to be the most powerful country that ruled most of the world, but over time, its strength started to wane. In the end, due to many reasons, such as these above, it was forgotten and gave way to new countries being created.