Answer:
b. At a population larger than before the transition, but with very slow or no growth
Step-by-step explanation:
The fourth demographic stage also known as the post-industrial stage refers to the stage of demographic transition when the population has stabilized and is close to achieving or has achieved zero population growth. This means that both the birth rate and death rate are very low. This leads to a sustainable and stabilized population with no major population changes. Most of the major European countries have achieved this along with North American countries. China and South Korea has also achieved fourth demographic stage.