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Question: Sensory clues to the possible presence of hazardous materials in water include:

Options:

  1.  Dead fish
  2.  White froth
  3.  Unusual algae growth
  4.  All of these

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4. All of these

Sensory clues to the possible presence of hazardous materials in water include Dead fish, White froth, Unusual algae growth... etc.

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