.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. Relate each of these factors to the household production model of labor supply.