The relative stability of a sewage sample, whose DO equals the total oxygen required to satisfy its BOD, is _______

The relative stability of a sewage sample, whose DO equals the total o

1.	The relative stability of a sewage sample, whose DO equals the total oxygen required to satisfy its BOD, is _______
A.	zero
B.	100 %
C.	1 %
D.	∞
Answer» C. 1 %