Which of the following shows the correct relationship? 

A)  Slow-flowing rivers are less susceptible to pollutants than fast-flowing streams. 
B)  The width and depth of the oxygen sag curve depend on water volume and flow rate. 
C)  The width and depth of the oxygen sag curve depend on river width and bottom substrate. 
D)  Streams can never recover from degradable pollutants if they are overloaded.

Oxygen Sag Curve

The Oxygen Sag Curve is a graph that depicts the reduction of dissolved oxygen in a body of water, typically as a result of organic matter decomposition and microbial consumption.

Degradable Pollutants

Pollutants capable of being broken down into less harmful substances by natural processes.

Water Volume

The quantity of three-dimensional space occupied by a liquid or gas, often measured in liters, gallons, or cubic meters.