Question

through which clause did state governments become bound by the bill of rights?
the citizenship clause
the equal protection clause
the due process clause
the enforcement clause

Explanation:

The 14th - Amendment's due - process clause has been used to incorporate most of the Bill of Rights against the states. Through a series of Supreme Court cases, the due - process clause has been interpreted to make the Bill of Rights applicable to state governments.

Answer:

the due process clause