During Stage 4 (A Postindustrial Economy) of the Demographic Transition

During Stage 4 (a postindustrial economy) of the demographic transition,

A) birth rates are very low, but death rates increase.
B) the birth rate falls into line with the death rate, and population growth slows down.
C) birth rates remain very high, and the death rate declines even further.
D) birth and the death rates are both low, so there is little or no natural increase in population.