Final answer:
The racial and ethnic diversity of the U.S. population, including the older population, is on the rise, which indicates that the statement in question is false.
Step-by-step explanation:
The statement that the ethnic and racial diversity of the older population is steadily declining is false. In fact, the United States is experiencing a significant increase in both ethnic and racial diversity across its population, including among the older demographic. According to the U.S. Bureau of the Census, while white Americans comprised 78% of the population in 2012, they are projected to comprise only 69% by 2060. Moreover, the Hispanic population is expected to see a substantial increase.
Furthermore, the workforce is becoming more diverse, not only in terms of ethnic and racial diversity but also with more women, who joined the workforce in the 1970s and 1980s, ascending the promotion ladders within their organizations. Immigrants and their descendants are also contributing to the changing demographics, which are reflected in both the younger and older populations.