A study of labor force participation rates of women in the post-World War II period noted:

Over the long run, women have joined the paid labor force because of a series of changes affecting the nature of work. Primary among these was:

A.) the rise of the clerical and professional sectors,

B.) the increased education of women,

C.) labor-saving advances in households,

D.) declining fertility rates, and

E.) increased urbanization.

The correct answer is D) Declining Fertility rates.

Explanation:

Lower Fertility Rates among women means that less and less women are capable of bearing children. Because bearing and raising children consumes a lot of women's time, it means that lower rates of fertility can, in principle, free up a huge amount of a woman's time, hence allowing her to enter the labor force more easily.

Cheers!

The correct answer is C) labor-saving advances in households.

A study of labor force participation rates of women in the post-World War II period noted:

Over the long run, women have joined the paid labor force because of a series of changes affecting the nature of work. Primary among these was labor-saving advances in households.

This is an important factor because new inventions and technology have allowed women to leave the house in order to have an education an enter the job force in the corporate world because they have shown the be very capable to perform jobs in industries and companies, at the highest levels. Today, many families need a double income in the house in order to make a decent living. So it is common to see the father and the mother having a job.