Final answer:
Following Rosa Parks' arrest, Martin Luther King Jr. aided in spearheading the Montgomery Bus Boycott, which culminated in a landmark legal triumph against bus segregation policies.
Step-by-step explanation:
Right after the arrest of Rosa Parks, Martin Luther King Jr. played a crucial role in responding to the incident by actively participating in the organization of the Montgomery Bus Boycott. The Montgomery Improvement Association was formed, with Dr. King as a leading figure, to orchestrate the boycott, starting on December 5th, in response to the segregation policies. A mass meeting was called following the distribution of flyers by students, instigated by Jo Ann Robinson, and the community's strategy was set in motion, leading to a historical 381-day boycott with Dr. King at its forefront. Despite challenges, including arrests and harassment, the African American community persisted in their nonviolent protest, with support from various sources such as college students, church groups, and local black-owned taxis.
The reverend's efforts, along with the community's unyielding support, ultimately led to success. On December 20, 1956, the U.S. Supreme Court declared the law requiring racially segregated seating on buses unconstitutional, marking a significant victory for the Civil Rights Movement orchestrated by Rosa Parks, Dr. King, and other key leaders like E.D. Nixon and Jo Ann Robinson.