Once Stare Decisis and Case Precedent Is Established

Once stare decisis and case precedent is established

A) it may be disregarded and overturned by a court if it deems such action appropriate.
B) it may not be disregarded by a court but may be overturned by state statute.
C) it may not be disregarded by a court or be overturned by state statute but may only be changed by amendment to the state's constitution.
D) it may not be disregarded or overturned once established and must be followed without exception.