A court is listening intently to counsel's argument regarding causation in a case arising in negligence. What must counsel have already firmly established to now be addressing the issue of causation for the court's deliberation?

Select one:

a.the identity of anyone who might reasonably be affected by another's conduct

b.the reasonableness of an exacting standard of care imposed on activities

c.the general standard that helps a court assess the defendant's negligence

d.that the defendant had a duty to avoid carelessness that caused harm to another