What were the main contributions of Frederick Douglass and Harriet Tubman to the abolitionist movement?

Explanation:

Frederick Douglass and the anti slavery movement His role was to travel and deliver speeches, distribute pamphlets and get subscribers to the Liberator. He traveled the country for four years until 1845 when he found himself in a dangerous situation as a fugitive slave.

#2 the answer is d

#3 the answer is a

#4 the answer is b

it was the first amendment