Answer:
Russia successfully revolted against its monarch
Explanation:
The Russian empire ended after the October revolution, in which the bolsheviks overthrew the Tsar, and created the Soviet Union.
Answer:
Another reason why the Middle Ages are often called the Dark Ages is because, compared with other eras, historians don't know as much about this time. In some ways, this period of time has been lost to history. Many important records from this time have not survived.
Explanation:
you can say according to the article they are called Middle ages because of the black death.
I believe the answer is ships
C. Nuclear power provides electricity at the lowest cost.
