It began when Octavian Caesar became the first emperor of Rome in 27 BC.
Answer: C is correct (the security arrangements that Stalin made to protect himself).
Explanation: the term "Iron Curtain" was used for the first time by Winston Churchill in American town of Fulton (Missouri) in 1946 (so-called "Fulton Speech). At that time Churchill was a ex-prime-minister, but the phenomenon of "Iron Curtain" was quite visible even from the UK.
Answer:
Three factors fueled American Imperialism.
Economic competition among industrial nations.
Political and military competition, including the creation of a strong naval force.
A belief in the racial and cultural superiority of people of Anglo-Saxon descent.
Provided water,food,transport and power
