Which of the following best explains a possible limitation of the trends assumed from the population pyramid and estimates in the data table? (A) A period of war followed by a baby boom, similar to that of the 1940s and 1950s, is likely to occur within a generation, increasing the youth-aged cohorts.
(B) Modernization of health-care systems may result in improvements in women’s health and pregnancy and result in more children being born, increasing the youth-aged cohorts.
(C) Labor shortages may cause the government to reduce the legal barriers to immigration, and immigrant populations could increase the working-age cohorts.
(D) Decreasing populations may cause an economic decline, prompting many citizens to emigrate to other more developed countries and decreasing the working-age cohorts.
(E) Production efficiencies gained from computerization and robotization of manufacturing may free parents from long work hours and result in more time to have additional children, increasing the youth-aged cohorts.