C. Reduces eutrophication.
Tertiary treatment is the last process done to waste water before realising it in to the enviroment or use it, eutrophication is an exces of minerals and inorganics compuonds in water.
I think its D or A im not 100% hope im right and it helps you out
Explanation:
well it can it will teach you different methods give u some classes give u some test umm I haven't asked a tutor yet but das my guess
<em>Hope</em><em> it</em><em> helps</em><em> ya</em><em> ItzAlex</em>
A) Crop rotation promotes soil conservation
