Final answer:
The agent has a duty to disclose known defects, and a failure to do so can result in a negligence claim. The correct answer is that the buyer must show Janie had a duty to disclose to him.
Step-by-step explanation:
The issue here involves the real estate agent's responsibility towards disclosure in a real estate transaction. According to real estate law, the agent has a duty to disclose any known material defects of the property to potential buyers. The correct answer is A) A buyer must show that Janie has a duty to disclose the information to him. As an agent representing the seller, Janie indeed has a fiduciary duty to the seller; however, this duty does not negate her obligation to be honest and forthright with potential buyers, particularly regarding known problems with the property. Failure to disclose known defects can result in a negligence claim against Janie. Therefore, options B, C, and D would not constitute a defense to negligence in this case.