The Landmark Case of Ultramares Corporation V

The landmark case of Ultramares Corporation v.Touche (1931) resulted in which precedent-setting doctrine?

A) An audit cannot be held liable to third party claimants,due to lack of privity of contract.
B) Auditor's owe a duty of care to all known third party claimants.
C) An auditor's duty of care extends to all third parties for losses that resulted from ordinary auditor negligence.
D) An auditor's duty of care extends to all third parties when the auditor commits fraud or constructive fraud.