Which statement best describes Frederick Douglass and his contributions to help end slavery?

A.
He founded a newspaper called The Liberator and wrote articles calling for an end to slavery.

B.
He was a runaway slave and an abolitionist who became a well-known abolitionist speaker.

C.
He seized a government storehouse, which was filled with guns, at Harper’s Ferry.

D.
He wrote and published Uncle Tom's Cabin.