The incident you're referring to likely pertains to the Montgomery Bus Boycott, which demonstrated the power of peaceful protest. This boycott lasted for over a year, beginning in December 1955, when Rosa Parks was arrested for refusing to give up her seat to a white passenger. The boycott was a pivotal event in the Civil Rights Movement, highlighting the effectiveness of nonviolent resistance and community organization in challenging segregation.
Given the options presented, the most relevant response is "The Montgomery Bus boycott which lasted a year." This event led to significant change, including the Supreme Court's decision that segregation on public buses was unconstitutional, marking a key victory in the struggle for civil rights.