Choice "C" is correct. Common law fraud requires a showing of intent to deceive, which is scienter.
Choice "d" is incorrect. Privity is not required in a common law fraud action. Therefore, lack of privity is not a defense.
Choice "b" is incorrect. Contributory negligence is a defense to a negligence cause of action in some jurisdictions, but it is not a defense to an action for fraud.
Choice "a" is incorrect. One cannot contractually limit liability for intentional torts.