A Seller's Property Disclosure form states that there are no known materials defects within property, but the listing licensee is aware of asbestos wrapped ducted pipes in the basement. The licensee should: 

1. disclose the existence of asbestos to all potential buyers. 

2. ask the seller's permission to disclose and abide by the seller's wishes. 

3. suggest the buyers have a home inspection and leave the discovery up to the inspector. 

4. suggest to the seller that he wrap the pipes to contain potential airborne contamination.