What factor do plessy v. ferguson, brown v. board of education, and regents of california v. bakke have in common?

all three cases improved civil rights for minorities.
all three cases went to the supreme court for ruling.
all three cases ruled in favor of the individual.
all three cases took place in the twentieth century.

All three cases went to the Supreme Court for ruling.

Explanation:

The cases that went to the supreme corut ruling will be more likely to be considered as a landmark decision, which is the type of decisions that influence the live of the people on national scale.

I'll describe the effect of each decisions on national scale:

-Plessy v. Ferguson,

This decision resulted in the application of segregation law. Black people all across the nation were required to use different public facilities than the white citizens because of this.

- Brown v. Board of Education,

This decision diminish the effect of plessy v. Ferguson since it make the segregation of schools become illegal.

- Regents of California v. Bakke

This affect the people nationally because it allow race to become a factor for college admission . (It become the basis of affirmative action that help minorities get into universities)