The quote below was written at the end of World War II: "Some who suspected that prior reports had been exaggerated ... felt compelled to admit, 'So it was true!' Others simply exclaimed, 'we didn't know!'" The quote above refers to what event having to do with the Jewish people?

a] Liberation of Nazi extermination camps by Allied soldiers

b]Anti-Jewish laws passed by the Nazis in the 1930s

c]Anti-Semitic broadcasts of Father Coughlin

d]Expressions of anti-Semitism by Congressman John Rankin