The Narrative of Sojourner Truth was written down by

A. Robert Matthews (Matthias).

B. Isabella Baumfree.

C. Olive Gilbert.

D. Charles Ardinburgh.

The question says, 'the Narrative of Sojourner Truth was written down by ... The correct option is B. Isabella Baumfree wrote the book. She was a slave before she got her freedom, she used the book to express her experience during the time she was a slave. She was actively involved in the fight against slavery during her life.