Katrina Is a Judge in the Manitoba Court of Appeal

Katrina is a judge in the Manitoba Court of Appeal.She is currently deciding a case regarding the rights of mothers to their unborn children.Which of the following is true in regards to Katrina's decision?

A) The rule of law states that Katrina must use both laws and her personal opinions to decide the case.
B) Katrina should consider decisions of the Supreme Court of the United States to be binding.
C) Katrina must not contradict her own court if a similar case has been decided in the Court of Appeal.
D) The doctrine of precedent states that Katrina must decide the case as it has been decided in the past.
E) The doctrine of precedent states that Katrina is only bound by decisions from the Supreme Court of Canada.