Judge Tatum is a lower court judge in Minnesota. A case comes before Judge Tatum regarding the admissibility of psychologists as expert witnesses. A higher court in Minnesota earlier ruled that psychologists cannot be expert witnesses because they are not medical doctors. Judge Tatum

	a.	does not need to follow this ruling due to judicial discretion.
	b.	must follow this ruling because of stare decisis.
	c.	does not need to follow this ruling because it is incorrect.
	d.	must follow this ruling because of the common law.