Answer:
in the post-world War II era, Western Nations saw C. A rise in the birth rate.
Step-by-step explanation:
First we will try to understand the meaning of the term 'Baby Boomers'. After world war 2, the USA witnessed increasing birthrate and about 4.24 million babies are added each year between 1946 and 1964. This is called Baby booming. Possible Reasons: Americans were confident that they could support more children after the war.
Present economic significance: It has a direct effect on AMERICAN economy today because most of the boomers are old today. So, the demogaraphic dividend of the country is very low compared to the other Asian countries.