How did members of the league of united latin american citizens (lulac) promote civil rights for latino americans?

The correct answer to this open question is the following.

Members of the League of United Latin American Citizens (LULAC) promoted civil rights for Latino Americans in the following way.

Established in Corpus Christy, Texas, in 1929, LULAC supported the rights of Hispanic people and demanded equal treatment for them. Members of LULAC negotiated with local and state authorities when they were discriminated for example, in public schools, but also used the legal system when was necessary. LULAC helped to end segregation in California public schools.

answer; continuing debate about how to interpret the constitution;