As a result of the Plessy v. Ferguson ruling, it took decades for segregation to be declared unconstitutional. it took a few years before segregation was declared unconstitutional. fewer facilities became segregated. railcars on trains were desegregated.

It took decades for segregation to be declared unconstitutional.

Explanation:

Plessy v. Ferguson was the case which Plessy, a black man, refused on June 7, 1892 to leave a seat destined to white people on a train, as stated in a segregation law. These laws stated the separation of white and black people in schools, railcars, churches, beaches and many public places.

Plessy was jailed and his prison was ruled as non-unconstitutional, because the judge understood social rights were not a guarantee by the 14 Amendment or the abolishing legislation of the U. S. constitution, at this time ruled out the doctrine of "separate but equal".

Only in 1954 in the case of Brown v. Board of Education, Chief Justice Earl Warren, declared that segregation was unconstitutional. So it took decades from Plessy v. Ferguson (1892) to Brown v. Board of Education (1954) for segregation to be declared unconstitutional.

A. it took decades for segregation to be declared unconstitutional.