The correct answer is A) civil rights legislation.
A major legacy of President Johnson's domestic policy was
civil rights legislation.
After the assassination of President John F. Kennedy, Lyndon B. Jhonson became the President of the United States. One of his priorities was to attend many problems that poor US citizens were enduring. That is why he created a series of programs called "The Great Society." Jhonson wanted to fight crime in America, reduce the inequity in the country, and put an end to racism in the US. That is why a major legacy of President Johnson's domestic policy was civil rights legislation.