What is a key difference between greywater use and water reclamation? a. If collected separately, greywater can be used for certain applications without treatment. b. Greywater use is more costly than water reclamation. c. Water from reclamation is always safe for drinking, while greywater is not. d. Greywater has been mixed with sewage, while reclaimed water is derived from clean water. Please select the best answer from the choices provided