Chief Justice earl Warren ruling was influential because ...

A: it held that public schools could not be segregated by race.

B: it held that public schools should have equal access to financial funds.

C: it held that public schools did not violate separate but equal laws

D: it held that public schools should have equal facilities for all races

Correct answer choice is:

A: It held that public schools could not be segregated by race.

Supreme Court Justice Earl Warren delivered the undivided ruling within the milestone of civil rights case Brown v. Board of Education of Topeka, Kansas. State-sanctioned isolation of public faculties was a violation of the fourteenth ordinal modification and was thus declared unconstitutional.

I believe that it is A. it held that public schools could not be segregated by race.

Not entirely sure but that seems like a pretty fair choice to me.