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The boycott started a massive nonviolent movement best summarises Montgomery Bus Boycott.
Montgomery Bus Boycott was a civil right, political and social protest which was based on racial segregation mass transit system.
It started on 5th Dec. 1955 after the arrest of Rosa parks on 1st of Dec., 1955.
It was a 13 month public mass transit protest which put an end to U.S supreme Court ruling that segregation on public transport system is not constitutional.
This occur when African Americans refused to ride in public buses in Montgomery Alabama and this led to the protest.
Therefore, The boycott started a massive nonviolent movement best summarises Montgomery Bus Boycott.
For more details on Montgomery Bus Boycott, check the link below.
https://brainly.com/question/1199306.