Answer B -Prelude to the crisis
The free city of West Berlin, surrounded by the communist German Democratic Republic (East Germany), was a Cold War crucible for the United States and the Soviet Union, in which both superpowers repeatedly asserted their claims to dominance in Europe.
Hegira
Hijrah also called Hegira is the migration or journey of the Islamic prophet Muhammad and his followers from Mecca to Yathrib, later renamed by him to Medina, in the year 622.
It refers to the period of time between the fall of the Roman Empire and the beginning of the Italian Renaissance and the age of Discovery.