In Which of the Following Would the Plaintiff Not Succeed

In which of the following would the plaintiff not succeed in an action for negligence?

A) A real estate agent accidentally forgot to lock the back door of the house he had just shown.Before the owner returned,someone broke in and stole the TV.The owner sued the agent.
B) Dr.Zotsky used the skill of a reasonable doctor in that field,but the patient did not respond to the treatment and lost sight in one eye.She sued the doctor.
C) May was made sick by drinking a contaminated cola bought for her by her friend Fred.She sued the manufacturer.
D) A real estate agent failed to check the zoning and assured the purchasers that they could build a duplex on the property.Relying on that statement,they purchased the property.
E) Nick was hurt when the driver of a Gino's pizza truck carelessly ran through a yellow traffic light on his way to deliver a pizza.Nick sued the driver and Gino,the driver's employer,although Gino wasn't in the truck.