I do not have your choices of "the following" Here are some reasons I learned: Christianity, empire was too big and became hard to manage, there were many nonromans attacking parts of empire- Goths, the emperors themselves were weak or insane intrigue was rampant.
Two conflicts-the War of the Spanish Succession and the war in the Baltic-almost merged into a single pan-European war. Even though Russia and Prussia appeared on the international scene, the balance of power that emerged after the Thirty Years ' War was never broken. None of the great powers could achieve unconditional dominance over rivals.
In the 18th century, France was weakened. Sweden, Spain, and Holland withdrew to the second roles. The strongest players looked England and the Austrian Empire. Prussia and Russia were gaining political weight.
The policy established by Mikhail Gorbachev was called glasnost and it can best be described as the policy of open discussion of political and social issues, which resulted in changes to the Soviet political structure. The correct option among all the options that are given in the question is the second option.
Our constitution created a system of checks and balances to insure that no one branch of government becomes too strong and be able to control all of the government
hope this helps
