________ is the removal of calcium, magnesium and certain other metal cations in hard water.

________ is the removal of calcium, magnesium and certain other metal

1.	________ is the removal of calcium, magnesium and certain other metal cations in hard water.
A.	Disinfection
B.	Sedimentation
C.	Softening
D.	Cleaning
Answer» D. Cleaning

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