The correct answer is A. Brown's acceptance of giving up his life for his beliefs.
John Brown was viewed by some Northerners as a martyr for his willingness to sacrifice his life in the fight against slavery. His execution following the raid on Harpers Ferry and his unwavering commitment to his anti-slavery beliefs resonated with many abolitionists and sympathizers in the North, leading to his martyrdom status in the eyes of those who shared his views.