People with Home Septic Systems Often Flush Several Cups of a Powdered

Multiple Choice

People with home septic systems often flush several cups of a powdered substance down their toilets every month or two to keep their systems healthy.These powdered substances most likely contain _________ .

A) acids that help to clean the insides of the walls of the pipes and septic tank
B) bacteria and enzymes that help break down wastes
C) chemicals that bind to heavy metals to keep them from leaching into the soil
D) chlorine and other disinfectants that help to prevent soil contamination