What country is most likely to be in stage 4 of population growth with a low birth rate and a low death rate

A country with a large population which is economically , technically and educationally advance is most likely to be in Stage 4 of population growth with low birth rate and low death rate.

Explanation:

When the people are highly educated , they become aware of family planning and increasing population.Educating women decreases fertility rate.Education develops a key concept of safe intercourse, proper family planning. Thus, decreases the birth rate.Death rate also decreases in such countries because they are technically and medically advance thus reducing the number of deaths per year caused due to negligence, epidemics and accidents.These countries are having almost a stable population.

Ithink the answer is nuclear membrane