Which quote describes the concerns Americans had about joining the North Atlantic Treaty Organization?

The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.

--Thomas Jefferson

Source: Bartleby.com

From Stettin in the Baltic to Trieste in the Adriatic an iron curtain has descended across the Continent.

--Winston Churchill

Source: History Guide

[L]et me assert my firm belief that the only thing we have to fear is fear itself.

--Franklin Delano Roosevelt

Source: History Matters

Why quit our own to stand upon foreign

Question

Which quote describes the concerns Americans had about joining the North Atlantic Treaty Organization?

 The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. 

--Thomas Jefferson 

Source: Bartleby.com

 From Stettin in the Baltic to Trieste in the Adriatic an iron curtain has descended across the Continent. 

--Winston Churchill 

Source: History Guide

 [L]et me assert my firm belief that the only thing we have to fear is fear itself. 

--Franklin Delano Roosevelt 

Source: History Matters

 Why quit our own to stand upon foreign

kohai · Answer

I'd probably go with (B) myself for the reason that NATO was eventually used to help curb Soviet influence in Europe (particularly against the Warsaw Pact). That's the "Iron Curtain" that Churchill warned about.