Which of the following is correct:

a)	The doctrine of precedent is old English law and is no longer relevant in the Australian legal system since appeals are no longer able to be made to the Privy Council.

b)	The doctrine of precedent is a fundamental constraint on judicial decision-making in Australia. The general idea behind the doctrine of precedent is that judges, when they are deciding cases, must pay proper respect to past judicial decisions.

c)	The doctrine of precedent is a fundamental constraint on judicial decision-making in Australia. A major limitation of this constraint is what the deciding judge believes is the most moral decision.