The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is

The minimum dissolved oxygen content (ppm) in a river necessary for th

1.	The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is
A.	0
B.	2
C.	4
D.	8
Answer» D. 8

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The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is

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