Bioremediation and Biological Oxygen Demand
Which of the following provides the strongest evidence to support the conclusion that bioremediation can significantly reduce the Biological Oxygen Demand (BOD) in polluted water?
| Method | BOD (mg/L) |
|---|---|
| Before Bioremediation | 15 |
| After Bioremediation | 4 |
A
A graph outlining changes in chemical oxygen demand unrelated to bioremediation processes.
B
A table comparing nitrate concentrations that does not reflect changes in BOD.
C
A narrative description of bioremediation benefits that lacks specific BOD measurements.
D
A table showing that BOD levels dropped from 15 mg/L before bioremediation to 4 mg/L after its implementation.
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