I never saw my mother, to know her as such, more than four or five times in my life; and each of these times was very short in duration, and at night. She was hired by a Mr. Stewart, who lived about twelve miles from my home. She made her journeys to see me in the night, travelling the whole distance on foot, after the performance of her day's work.

Which rhetorical appeal or device does Frederick Douglass use in this description of his mother?

Irony, because he is saying something about his mother that is the opposite of what he means
Logos, because he presents only the facts about his encounters with his mother
Pathos, because he is emotional in his description of his relationship with his mother
Rhetorical question, because he wants the reader to think about his mother through a question