This table shows statistics about the US population in 2010.
US Population by Age Group (2010)
\begin{tabular}{|l|l|l|}
\hline Age Group & \begin{tabular}{l}
Percent of \\
Population
\end{tabular} & \begin{tabular}{l}
Total \\
Number
\end{tabular} \\
\hline Under 18 & [tex]$24.0 \%$[/tex] & [tex]$74,181,467$[/tex] \\
\hline [tex]$18-24$[/tex] & [tex]$9.9 \%$[/tex] & [tex]$30,672,088$[/tex] \\
\hline [tex]$25-44$[/tex] & [tex]$26.6 \%$[/tex] & [tex]$82,134,554$[/tex] \\
\hline [tex]$45-64$[/tex] & [tex]$26.4 \%$[/tex] & [tex]$81,489,445$[/tex] \\
\hline \begin{tabular}{l}
65 and \\
older
\end{tabular} & [tex]$13.0 \%$[/tex] & [tex]$40,267,984$[/tex] \\
\hline
\end{tabular}
Which demographic trend does this table best support?
A. People are marrying later than they used to.
B. There are more single-parent families.
C. The American population is more diverse.
D. There are fewer younger adults than older adults.