Which statement highlights the greatest impact john f. kennedyâs assassination had on the us? question 19 options: his assassination led to the us retaliating by assassinating soviet premier nikita khrushchev in 1971 which brought the world to the brink of nuclear war lyndon johnson convinced congress that passing kennedyâs political agenda of civil rights legislation would honor his death the assassination of kennedy prompted the creation of the secret service to protect future presidents from assassination attempts the assassination of kennedy ended the civil rights movement