The correct response is: "It means that state courts can hear a wide variety of cases to interpret and uphold state laws."
This idea of "broad jurisdiction" allows state courts to handle a diverse array of cases, which enables them to exercise their powers and interpret state laws effectively. This function is crucial for maintaining the balance of power between state and federal systems, as outlined in Article III of the Constitution, which delineates the jurisdiction of federal courts and leaves the vast majority of legal issues to state courts.