When does the growth rate of a population following the logistic model equal zero ? The logistic model is given as dN/dt = rN(1-N/K) :-

1. A. (1) when N/K is exactly one.
2. B. (2) when N nears the carrying capacity of the habitat.
3. C. (3) when N/K equals zero.
4. D. (4) when death rate is greater than birth rate.

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