Answer: D
Explanation: The term Iron Curtain had been in occasional and varied use as a metaphor since the 19th century, but it came to prominence only after it was used by former British Prime Minister Winston Churchill in a speech at Fulton, Missouri, U.S. On March 5, 1946, when he said of the communist states "From Stettin in the Baltic to Trieste in the Adriatic an iron curtain has descended across the continent."
