One similarity you could draw between mlk and obama`s nobel peace prize acceptance speeches is the
overall tone of:

a. hopelessness
b. humility
c. arrogance

The correct option is "B. Humility "

Martin Luther King, was an American pastor of the Baptist Church and an activist who carried out crucial work in the United States at the forefront of the civil rights movement for African-Americans and who also participated as an activist in numerous anti-war protests. Vietnam and poverty in general. For this activity aimed at ending US segregation and racial discrimination through non-violent means, he was awarded the Nobel Peace Prize. Barack Hussein Obama is an American politician who served as the 44th President of the United States of America from January 20, 2009 until January 20, 2017. On October 9 of that year he was awarded the Nobel Prize in Peace for its diplomatic efforts in favor of nuclear disarmament, the achievement of a peace process in the Middle East and the promotion of the fight against climate change.