5. The main purpose of "The Great Stink" is to


; whereas the main purpose of


"Toilets of the Future" is to


explain how flush toilets work; educate readers


about water-related diseases


® teach readers about cholera; introduce readers


to the tiger worm


© detail a sewage crisis that changed history:


spotlight possible solutions to today's


sanitation challenges


O caution readers about the possibility of a new


sewage crisis; convince readers to compost


Plsss help