For the survival of fish, the minimum level of Dissolved Oxygen (DO) necessary in the rivers and streams is

For the survival of fish, the minimum level of Dissolved Oxygen (DO) n

1.	For the survival of fish, the minimum level of Dissolved Oxygen (DO) necessary in the rivers and streams is
A.	1 mg/L
B.	2 mg/L
C.	4 mg/L
D.	8 mg/L
Answer» D. 8 mg/L