Answer:
Legal actions
Step-by-step explanation:
The NAACP usually tried to advance their black civil rights movement through legal action, getting legislation passed, and going to court.
For example, one of their biggest accomplishments was in Brown v Board, which desegregated all public schools.
The organization also lobbied for a variety of different legislation, including the Civil Rights Act of 1964 and the Voting Rights Act of 1965.
So, the NAACP usually tried to advance their cause through legal actions.