I would say A. because questions have nothing to do with head aches so B is out. C is out because you wouldn't generally find joy in that or would you reask many questions. D. is a no because what does sleep have to do with questions.
I think the answer would be statement number 3. Rain barrels comes along with some environmental benefits. It helps you save water. Many people would often squander water to the point that most dams and water suppliers dries up during the summer season.
Your answer is going to be B