In the passage, what type of details does wiesel use to develop his claims?

a. the constitution
b. quotations
c. personal experience
d. statistics

fifty-four years ago to the day, a young jewish boy from a small town in the
carpathian mountains woke up, not far from goethe's beloved weimar, in a place of
eternal infamy called buchenwald. he was finally free, but there was no joy in his
heart. he thought there never would be again. liberated a day earlier by american
soldiers, he remembers their rage at what they saw. and even if he lives to be a
very old man, he will always be grateful to them for that rage, and also for their
compassion. though he did not understand their language, their eyes told him what
he needed to know—that they, too, would remember, and bear witness.
and now, i stand before you, mr. president—commander-in-chief of the army that
freed me, and tens of thousands of others—and i am filled with a profound and
abiding gratitude to the american people. "gratitude" is a word that i cherish.
gratitude is what defines the humanity of the human being. and i am grateful to
you, hillary, or mrs. clinton, for what you said, and for what you are doing for
children in the world, for the homeless, for the victims of injustice, the victims of
destiny and society. and i all of you for being here.