Which of the Following Would Be a Supervening Event from the Standpoint

Which of the following would be a supervening event from the standpoint of a car manufacturer that has been sued in strict liability for an injury caused by one of its cars?

A) A redesign of the particular model car such that the ones being currently manufactured do not have the defect which led to the injury.
B) A recall notice sent to the car owner which was ignored.
C) An enactment,after the date of the injury,of a new safety regulation that would have prevented the injury.
D) The fact that the defect was caused by the car dealer when the car dealer was installing accessories for the purchaser.