Which best explains why the supreme court’s decision in plessy v. ferguson was unconstitutional?
the supreme court’s ruling allowed states to deny equal protection to any person within its jurisdiction.
since the 14th amendment did not make concessions for people born outside the us, the supreme court’s decision could not be applied.
the supreme court’s decision gave individual states the freedom to make their own laws in relation to non-whites.
since segregation laws did not provide equal protections or liberties to non-whites, the ruling was not consistent with the 14th amendment.

Since segregation laws did not provide equal protections or liberties to non-whites, the ruling was not consistent with the 14th Amendment.

Explanation:

In the Plessy v. Ferguson Case (1896), the Supreme Court ruled that racially segregated public facilities were legal because they did not imply any inequality toward African Americans: they were consistent to the doctrine of "separate but equal."

However, this decision was later rendered invalid in the Brown v. Board of Education Case (1954) which proved that segregation laws did not provide equal protections or liberties to non-whites: the facilities were unequal and they were a form of discrimination. Thus, those segregation laws violated the equal protection of the laws stated in the 14th Amendment.

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.