The defenses to negligence

Discussion A
Two of the defenses to negligence that you will be studying this week are contributory negligence and comparative negligence. Contributory Negligence is the common law rule. Comparative Negligence is a modern rule adopted in some jurisdictions. Which do you think is the better rule and what do you base that evaluation on?
Discussion B
There are two type of Comparative Negligence, pure and partial. Which do you think is the better type and explain why you hold that belief.
Discussion C
Another defense to negligence is Assumption of the risk. What do you think of this rule and the many exceptions to the rule?