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)

Question

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)

When death rate is greater than birth rate.

When N/K equals zero.

When N/K is exactly one.

When N nears the carrying capacity of the habitat.

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