Cal Is Driving a Car in Which Duff Is a Passenger

Multiple Choice

Cal is driving a car in which Duff is a passenger when an accident occurs. Cal and Duff are emotionally rattled, but neither is physically hurt. Cal is not liable to Duff on a negligence theory because​

A) ​both parties were emotionally rattled.
B) ​Cal did not apparently intend to cause an accident.
C) ​Duff must have been comparatively negligent.
D) ​Duff was not injured.