单项选择题
A．How they were brought to the United States from Africa. B．The release of the collection of recordings. C．What happened 60 years after their emancipation D．Their experiences as slaves and their lives as free men and women.
A．26 years. B．33 years. C．44 years. D．57 years.
A．The End of the U. S. Civil War B．The Library of Congress C．Voices from the Days of Slavery D．The Recordings of Written Stories