Which best describes the United States' response to Nazi killing of European Jews?

a.
The United States did very little to help the Jews until late in the war and with limited action after the war.
b.
The United States willingly accepted most of the Jewish refugees.
c.
The United States insisted that all nations change their immigration laws to help protect Jewish refugees from extermination.
d.
There was very little prejudice or discrimination against Jewish people in the United States in the 1940's.