How did harry truman's presidency impact the civil rights of african-americans during the late 1940's and early 1950's? a) during truman's presidency, african-americans experienced an increased level of discrimination and racism. b civil rights for african-americans decreased during truman's administration due to his segregationist policies. c) african-americans experienced an improved level of civil rights, including the desegregation of the military and the federal government. d) harry truman's presidency had little effect of the civil rights of african-americans because of his administration's focus on foreign affairs.