In an Action for Liability Based on Negligence

In an action for liability based on negligence:

A) a contractual relationship is involved and it does matter whether or not the buyer dealt directly with the manufacturer.
B) the manufacturer's duty of care extends to all persons who might foreseeably be injured if the manufacturer does not exercise its duty of care.
C) disclaimers in contracts are usually effective to shield a manufacturer or seller against liability for negligence to consumers.
D) the obvious danger rule can be used for complete defense.