Here's a problem to solve: 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?

Among the 4 following options, which is the correct answer?

- A: washing dishes and drinking
 
- B: drinking and irrigating flowerbeds
 
- C: irrigating flowerbeds and watering trees
 
- D: watering trees and washing dishes
 