Read this excerpt from a speech by US president Lyndon B. Johnson. Which phrase refers to the origins of American immigrants?
Our beautiful America was built by a nation of strangers. From a hundred different places or more they have poured forth into an empty land,
joining and blending in one mighty and irresistible tide.
The land flourished because it was fed from so many sources-because it was nourished by so many cultures and traditions and peoples.​