Answer:
In China, after thirty years, statistics showed annual population growth had C. slowed.
Step-by-step explanation:
China is the most populated country in the world. So, there are many preventive measures applied by the Chinese government to maintain the population. Hence, the statistics also shows that the population of china after thirty years will have the slow increase rate due to these preventive measures.
The one child policy has been widely adopted that helped china to slower the population increasing rate. It is not humanly possible to decrease the population over night except any natural calamities but in years to come it can be slowly decreased to the surface level.