At Common Law, the Defendant Is Said to Have Breached

At common law, the defendant is said to have breached their duty of care if:

A) they failed to do what a reasonable person would have done in the circumstances.
B) it is reasonably foreseeable that their conduct could cause harm to the plaintiff.
C) the damage suffered by the plaintiff, due to defendant's conduct, was reasonably foreseeable.
D) the defendant's conduct caused the harm suffered by the plaintiff.