Final answer:
The answer is option b. The year a house was built (1985) is not typically a concern for buyers unless there are additional problems, unlike properties in historic districts, wetlands, or flood plains which can involve restrictions and risks.
Step-by-step explanation:
When considering the options provided as to which would NOT likely be a location issue of concern to buyers, it is important to focus on factors that impact the desirability, safety, and legal implications of owning a property. Options such as 'a. the house sits in a historic preservation district,' 'c. the property borders a wetland,' and 'd. the property sits in a flood plain' are all conditions that could present various challenges or restrictions for a homeowner. However, 'b. the house was built in 1985' does not inherently present a known issue unless there are specific problems associated with the building's condition or local building codes.
Historic preservation districts can impose restrictions on renovations and alterations to maintain the historical character of the area. Properties bordering wetlands might have environmental restrictions to preserve the ecosystem, and those in a flood plain could require additional insurance and are at higher risk for flooding.
In summary, the house's construction year, 1985, is less likely to be of concern unless there are other underlying issues. Therefore, the correct option for a location issue that would NOT likely be of concern to buyers is option b.