Final answer:
By 2030, over 20 percent of the U.S. population will be 65 years old or older, illustrating the significant demographic shift known as "the graying of America."
Step-by-step explanation:
By 2030, more than 20 percent of the population of the United States will be aged 65+ years. This demographic change, often referred to as "the graying of America," indicates a significant shift in the age distribution. According to the U.S. Census Bureau, by 2013, 20% of the U.S. population was already over 60 years old, translating to almost 63 million people. While there is a notable increase in the population of those aged 65 and over, it does not quite reach the 40% or higher that some of the multiple-choice options might suggest.Furthermore, the text mentions that by 2030, the U.S. age distribution would reveal that this age group would account for 53.6% of the total population, supporting the idea that the percentage of the population aged 65+ would indeed be greater than 20%.