Question

the practice of selective incorporation means that the bill of rights will
always be applied to the states by the court.
never be applied to the states by the court.
sometimes be applied to the court by the states.
sometimes be applied to the states by the court.

Explanation:

Selective incorporation is the process by which the Supreme Court applies parts of the Bill of Rights to the states on a case - by - case (or "selective") basis. So it is not an all - or - nothing application (ruling out "always" and "never"). Also, the application is from the Court to the states, not the other way around (ruling out the option about states applying to the Court). Thus, the Bill of Rights is sometimes applied to the states by the Court.

Answer:

D. sometimes be applied to the states by the Court.