When do we need to need to use an alternate calculation for the Deficit?$$

Question $4$Select one:

a$.$

When the rate constant for reaeration is equal to the rate constant of deoxygenation.

b$.$

During a financial crisis of debt spending

c$.$

At the critical point of the oxygen sag curve.

d$.$

When the rate of reaeration is equal to the rate of deoxygenation