Identify three distinct legal theories that can lead to liability for an unsafe or defective product.

Under a theory of negligence,a person injured by an unsafe product can successfully bring suit if she can prove the company breached its duty of care and its breach was the proximate cause of the person's injuries.  Under a strict product liability theory,a company can be held liable for selling a product that is defective and unreasonably safe,regardless of it exercise proper care in the preparation and sale of the product.  Under a contract theory,a seller can be liable for selling a product that is not fit for its ordinary purpose.