One of the Most Significant Trends in the United States

One of the most significant trends in the United States has been

A) increasing equalization of income, which creates demands on government to fund programs for the middle class.
B) increasing levels of voter turnout in elections at all levels, which creates demands on government to pay attention to the needs of the electorate.
C) the declining of average age of the population creates demands on government for programs to address the needs of youth.
D) the aging of the population, which creates demands on government for programs to deal with the problems of the elderly.
E) all of the above