Respuesta :
Martin Luther King was referring to the Jim Crow laws, which introduced such separation - of waiting rooms, eating places, and others - for people of different races.
I believe the answer is: Jim Crow Laws.
Through the Jim Crow laws, African American citizens were discriminated against by requiring them to use government establishments that are separated from the white citizens. This make them forced to use lower quality seat on the bus, lower quality schools, lower quality restaurants, etc.