Houses built before which year need a lead-based paint disclosure?

Houses built before 1978 need a lead-based paint disclosure because that is when the U.S. government banned the use of lead-based paint in residential properties. Therefore, any house built before 1978 may still contain lead-based paint, which is hazardous to humans, especially young children. Options B, C, and D are incorrect because they are all after 1978 and therefore do not meet the requirement for a lead-based paint disclosure. It is important for potential homebuyers or renters to receive this disclosure to make an informed decision about the safety of the property.