washing dishes and drinking drinking and irrigating flowerbeds irrigating flowerbeds and watering trees watering trees and washing dishes
I gave my students this multiple choice question: Wastewater from homes is not all the same. Greywater refers to home wastewater from sinks and tubs. It does not contain human biological wastes, so it can be reused instead of being treated as sewage. Which uses of greywater demonstrate good stewardship?

Only one answer is correct among these 4 choices:
- washing dishes and drinking
- drinking and irrigating flowerbeds
- irrigating flowerbeds and watering trees
- watering trees and washing dishes

Could you tell me which one is correct?

irrigating flowerbeds and watering trees