Answer: Jackie was arrested for refusing to move to the back of a segregated bus would be the best fact to nominate Jackie Robinson for the “Most Courageous” category in a yearbook.
Explanation: This fact highlights Jackie Robinson's willingness to stand up against racial discrimination and segregation, even while serving in the military. His refusal to comply with the discriminatory practice of bus segregation, and his subsequent arrest and court-martial, demonstrate a strong sense of conviction and courage in the face of adversity. This act of civil disobedience aligns with the criteria of "Most Courageous" category in a yearbook, which is typically reserved for individuals who have shown bravery and valor in the face of difficult challenges.