Final answer:
Raul's concern about filling positions when older workers retire is due to the deficiency in math and science education among younger workers, necessary for high-growth industries. The correct answer is option d.
Step-by-step explanation:
Raul is concerned that when his older workers retire, he will not be able to fill their positions because too few students are receiving the solid math and science education required in high-growth industries.
Several factors contribute to this concern. The aging baby boomer generation is leading to a decrease in the proportion of young workers in the economy. At the same time, the skills required for various high-growth industries are becoming more technical and specialized, emphasizing the importance of strong education in math and science. The mismatch between workers' skills and the needs of these industries may lead to longer periods of unemployment and difficulty in filling positions left by retiring workers.
Moreover, the decline in family size in Europe and the aging labor force implies fewer entry-level workers and a growing number of professionals are retiring, exacerbating the labor shortage.
Additionally, the outsourcing of manufacturing and low-level clerical jobs has reduced the availability of high-paying positions that require less specialized education, increasing the need for a highly skilled workforce.