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.
Can you please elaborate your question
A <em>stupa</em> is a type of Buddhist monument that houses sacred relics (of Buddha or other saintly persons and even sacred concepts) and serves as a place of meditation. It features a hemispherical form, although in some countries it has adopted other forms (bell, or with multiple stories). Worshipers walk around the building in a clockwise direction.
Mainly trading but also because of sugar and cropping in the 1500s was a big money maker
