science help pls pls

A pond is located beside an open mine. Mercury from the mine contaminates the river water. This is an example of

single pollution
multiple pollution
point source pollution
non-point source pollution

would this one be c or b. im having trouble with this one.

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  1. It doesn't appear to be a multiple pollution.

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    Ms. Sue
  2. so it would be c

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  3. Yes. It's c.

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    Ms. Sue

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