(1) A person is not negligent in failing to take precautions against a risk of harm unless—
(a) the risk was foreseeable (that is, it is a risk of which the person knew or ought to have known); and
(b) the risk was not insignificant; and
(c) in the circumstances, a reasonable person in the person's position would have taken those precautions.
(2) In deciding whether a reasonable person would have taken precautions against a risk of harm, the court must consider the following (among other relevant things):
(a) the probability that the harm would happen if precautions were not taken;
(b) the likely seriousness of the harm;
(c) the burden of taking precautions to avoid the risk of harm;
(d) the social utility of the activity creating the risk of harm.