What are two chemicals used to remove contaminants from drinking water?
A)Chlorine & Aluminum Sulfate
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B)Copper Chloride & Sodium Nitrate
C)Potassium thiocyanate & ammonia
D)Sodium Chloride & Aluminum

answer; i believe the answer is (polygenic inheritance;

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.