What's an abolitionist? What are differences and similarities in the tactics to end slavery between Frederick Douglass and Harriet Tubman?

~ An abolitionist is a person who supported the abolition of slavery in the United States.

~ Both were slaves, but escaped to freedom. Harriet Tubman helped construct the Underground Railroad to help other slaves escape to freedom in Canada. Fredrick Douglass escaped from slavery in Maryland, he became a national leader of the abolitionist movement.  ( Either in Massachusetts or New York, can't remember, probably something to google ).

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

the urdan working class