What must a licensee disclose to a potential purchaser when they have a personal interest in the property being sold?

Option A: Only the purchase price they originally paid

Option A is insufficient because only disclosing the original purchase price provides incomplete information. The disclosure requirement under section 137 is much broader, requiring revelation of the 'nature and extent' of interest, which includes relationships, timing of acquisition, intended use, and other relevant circumstances that could affect the transaction.

Option C: Only that they work for the agency

Option C is inadequate because simply stating employment with the agency doesn't address personal interest in the specific property. Section 137 requires disclosure of interest in the particular transaction, not just general professional relationships. A licensee could work for an agency but still have personal ownership or other interests requiring separate disclosure.

Option D: Nothing, as long as the vendor agrees

Option D is incorrect because disclosure obligations under section 137 are mandatory and cannot be waived by vendor agreement. These consumer protection requirements exist in law regardless of what parties might prefer, ensuring transparency standards are maintained across all transactions to protect public interests.