Which statement correctly analyzes the effectiveness of the argument's structure ?
A. The structure effectively contrasts the speaker's abolitionist beliefs with the beliefs shared by many people living in the North at this time.
B. The structure ineffectively explains the reasons why the speaker strongly opposes the institution of slavery .
C. The structure effectively shows how the speaker's observations and personal experiences shaped the formation of her abolitionist principles .
D. The structure ineffectively describes the speaker's personal background and her relationship to slavery and the South.