César Chávez is an important civil rights figure in the United States. What is he BEST known for?
Group of answer choices

his work for the American labor movement, including starting the National Farm Workers Association

starting the first branch of the NAACP, the National Association for the Advancement of Colored People, in 1909

helping the early women's rights movement, including his support of the first National Women's Rights Convention

becoming the first judge of Mexican descent on the Supreme Court of the United States