In an Action in Negligence, Once the Plaintiff Has Established

In an action in negligence, once the plaintiff has established that the defendant has breached their duty of care, the plaintiff has to prove:

A) that the defendant's breach of duty caused the harm suffered by the plaintiff.
B) that the defendant's conduct was unreasonable in the circumstances.
C) that the defendant's conduct was reasonably foreseeable and the risk was not insignificant.
D) that the plaintiff took all reasonable steps to avoid the harm in the circumstances.