John is negligent and crashes his car into Annes car. Annes car runs into an electrical pole, which falls onto her car. As a result of this electrical pole falling, power goes out in the neighborhood for several hours. A resident of the affected neighborhood, Xao, has no light in the house. Xao steps on a small plastic toy belonging to his kids, falls, and breaks his knee. Xao sues John. John's best defense is that:

The electrical power pole should not have fallen due to the impact from John's car. Xao was contributorily or comparatively negligent in not cleaning up his kids toys. There is no proximate cause between John's action and Xao's injury. Xao did not meet the reasonable person standard, even though John had been duly licensed to drive by the state.