The correct answer to this open question is the following.
Although the question has no options, references, or time context, we can say that it refers to the marches of Mexican students in East Los Angeles in the 1960s. By 1967, Racism, bad school conditions, and lack of opportunities for Mexican students in Los Angeles made students organize marches and protest to demand a real change. The school system agreed to hold meetings with students and parents to hear their concerns. The above-mentioned issues came up and the changes that occurred because of the direct actions by the students and families were an open line of communication with school authorities and immunity for the students that had participated in the marches. The Educational Issues Coordinating Committee accepted conversations about education reform, and the students could return to classes.
It really helped that teachers like Sal Castro had supported students such as Moctezuma Esparza and Paola Crisóstomo.