Select the correct answer. A population's instantaneous growth rate is the rate at which it grows for every instant in time. Function r gives the instantaneous growth
rate of a bacterial culture x hours after the start of an experiment.
r(x) = 0.01(x+ 2)(x²– 9)
How many hours after the experiment began was the instantaneous growth rate equal to 0?
A. 9
В.3
C.2
D.0