A. Violent attacks form the Eastern tribes even led to the downfall of Rome, as soon as the mongols got to Rome they had no challenge in defeating such a weak nation in it's decline.
Answer:
B. It established two houses: the House of Representatives where state size determined number of representatives, and the Senate where each state would have only two senators no matter what its size
Explanation:
The Great Compromise led to the formation of a bicameral legislature that comprised of the House of Representatives and the Senate. The problem which led to the formation of these houses was the contention between the small and large states. The large states wanted representation on the basis of numbers while the small states wanted representation equal representation to avoid domination by the larger states.
Roger Sherman and Oliver Ellsworth proposed this Great compromise that eventually resolved the problem between the opposing parties. The house of representatives allowed the representation of the states on the basis of numbers while the senate allowed each state no matter the population to only have two elected representatives.
The First Battle of the Marne.