What factors are influencing the behavior of birth rate? I. The number of women of childbearing age. II. The adoption of family planning systems. III. The incorporation of women into paid work. A) Only I
B) Only III
C) I and II only
D) Only II and III
E) I, II and III

The answer is E

Explanation:

I believe that the answer is E because the factor's effecting the birth rate in a country are:

Existing age-sex structure

Availability of family planning services

Social and religious beliefs - especially in relation to contraception and abortion

Female employment

Economic prosperity (although in theory when the economy is doing well families can afford to have more children in practice the higher the economic prosperity the lower the birth rate).

Poverty levels – children can be seen as an economic resource in developing countries as they can earn money

Infant Mortality Rate – a family may have more children if a country's IMR is high as it is likely some of those children will die.

Conflicts

Typical age of marriage

Source- https://www.dineshbakshi.com/igcse-gcse-economics/developed-and-developing-economies/revision-notes/138-factors-affecting-population#:~:text=Factors%20affecting%20the%20birth,Typical%20age%20of%20marriage

d.prevent the spread of communism outside of eastern europe.