The correct answer is A) Quoting Eichmann and then quoting Schachter, who had drastically different views.
The contrasts in tone that the writer of this story provides for the reader is "Quoting Eichmann and then quoting Schachter, who had drastically different views."
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The above-mentioned affirmation is correct in that the author is writing about the Nazis' concentration camps where they killed Jewish people in the gas chambers, and mention the importance of the music Rafael Schanachter played. This man formed a group of people to sing during the horrible times of the Holocaust. This happened in the Terezin camp, in Czechoslovakia.
That is when Adolph Eichmann said "These Jews are singing their own requiem," referring to the fact that Jews were singing "Requiem Mass" written by Guiseppe Verdi.
Then the author contrasted the different views of Schachter, who said "Whatever we do here is just a rehearsal for when we will play Verdi in a grand concert hall in Prague in freedom."