Search Topic: I am interested in finding out more about contaminants in American big city water suppliers.
Based on the search above, do the options below use search strategies correctly? Could they be improved?
Search A:
“big city” AND water
Search B:
contaminant OR "human activity"
Search C:
contaminant OR pollutant OR toxin
AND
"water quality"
Search D:
"san francisco" OR "los angeles" OR "new york"
AND
pollution*
AND
health
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