Corinna was riding her bike on a city street. While she was riding, she frequently looked back to verify that the books that she had fastened to the rear part of her bike were still attached. On one occasion while she was looking behind her, she failed to notice a car that was entering an intersection just as she was crossing it. The car hit her, causing her to sustain numerous injuries. Three eyewitnesses stated that the driver of the car had failed to stop at the stop sign before entering the intersection. Corinna sued the driver of the car for negligence. What defenses might the defendant driver raise in this lawsuit? Discuss fully.