Concept:Arrange houses left to right based on relative positions.Explanation:• "A is right of B" means B is left of A: B ... A.• "E is left of C and right of A" means A ... E ... C.• "B is right of D" means D ... B.Combining: D ... B ... A ... E ... C.So the order from left to right is D, B, A, E, C.The middle (third) house is A.Answer:A