It is important to maintain septic systems in order to _______.a.prevent treated sewage from contaminating groundwaterb.process human waste into fertilizerc.prevent untreated sewage from contaminating groundwaterd.none of the above

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C

Cumulative Exam

It is important to maintain septic systems in order to _______.a.prevent treated sewage from contaminating groundwaterb.process human waste into fertilizerc.prevent untreated sewage from contaminating groundwaterd.none of the above

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