Jones is selling a house to Smith.
Conclusion
Fact-set; the right answer follows directly from the contract terms and the truss-roof fact.
Evidence
(1) For up to a year after ownership transfer, Jones is responsible for repairing "major structural defects," defined as defects in the roof or roof-supporting components. (2) Jones is not responsible for any other repairs. (3) The house has a truss roof, meaning only the exterior walls support the roof.
Evaluate
Plug in the truss-roof fact. The "roof-supporting components" of this particular house are the exterior walls (and the roof itself). So the nonexterior (interior) walls don't support the roof. They aren't covered by the "major structural defects" definition. And Jones is explicitly not responsible for anything else. Therefore Jones has no obligation to repair defects in the interior walls.
Goal
Find the answer that says: the contract doesn't oblige Jones to repair defects in the house's nonexterior walls. Avoid answers that overstate (claim no defects currently exist), shift to Smith's obligations, or invent facts about the past or about what Jones knew.