A Population Size Will Remain Stable If

A population size will remain stable if:

A) the number of births each year is constant and the birth rate is higher than the death rate.
B) the population grows by a fixed percentage of its size each year.
C) the rate of emigration is higher than the rate of immigration.
D) the birth and death rates are equal, as are the rates of emigration and immigration.
E) environmental resistance declines each year.