C). by relating the terrible conditions their ancestors faced.
Explanation:
'Pathos' is characterized as one of the three persuasive devices(stated by Aristotle) which implies convincing the audience emotionally by invoking their feelings.
In the given excerpt, Tubman employs pathos to persuade her group to keep moving forward 'by relating the awful conditions their ancestors faced' using the descriptive words like 'long agony,' 'sloave ships', 'black horror', 'chains and the whips', etc. <u>These words evoke the sympathetic emotions of the listeners and convince them to not stop this journey and keep going ahead('hard way they had come...yet to go')</u>. Thus, <u>option C</u> is the correct answer.
