A potential buyer may want to be informed about whether the previous or current occupant of a home has AIDS or HIV. This information is private and should not be disclosed.
Part of the reason that this topic is not required to tell to a third party is because:
a) It has nothing to do with the property.
b) Disclosing that information could be a violation of Fair Housing Laws and the privacy of the person in question.
c) Both a and b
d) None of the above