APFIVE Ranking Sources of Heavy Metal Contamination
Rank the following sources by their potential for heavy metal contamination, ordering them from the highest risk to the lowest risk based on the table.
| Source | Relative Risk for Heavy Metal Contamination |
|---|---|
| Mining | Very High |
| Urban Runoff | High |
| Industrial Discharge (Point Source) | Moderate |
| Oil Spills | Low |
A
Industrial Discharge, Urban Runoff, Mining, Oil Spills
B
Mining, Industrial Discharge, Urban Runoff, Oil Spills
C
Mining, Urban Runoff, Industrial Discharge, Oil Spills
D
Urban Runoff, Mining, Industrial Discharge, Oil Spills
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