What is one benefit of a country joining the United Nations?

a) To become a democratic government
b) To develop friendly relations with other nations
c) To protect its citizens from neighboring countries
d) To project its economic growth for several decades

B

Explanation:

Aid and assistance : This is one of the major advantages a country gets from being part of the United Nations organization. In the event that the country is plagued with a major disaster such as a major earthquake, tsunami or flood, the UN would not hesitate for a moment sending help to the country.

couples could only have one child to reduce the population growth.

yup! you are correct it is b.