Read the following sentence from the section "Rising Skepticism." "It also didn't hold up to the wave of xenophobia that swept the country right after World War I, leading to legislation, which sharply limited immigration from Southern and Eastern Europe and all non-European countries."

Which sentence from the section BEST emphasizes what the author means by "xenophobia"?

A
"It didn't apply to Asian immigrants, whose arrival was sharply limited by Chinese Exclusion Acts passed in the late 19th and early 20th centuries.
B
Also, after the First World War, the U. S. as a nation began to become skeptical of the waves of huddled masses entering the country.
C
There was the rise of eugenics and racial theories teaching that peoples from the Mediterranean and Eastern Europe, including Jews, were "polluting" the Nordic stocks of Northern Europe.
D
"That optimism about the capacity of the country to absorb and transform poor immigrants had tremendous power, but also had limits," says Mark Naison, a professor of history and African- American studies at Fordham University in New York.