Since the 1980s, the United States has faced several economic challenges that have shaped its financial landscape. One of the most significant issues has been the rise of income inequality, which has sparked debates about economic policies and their effectiveness. This period also included economic recessions, shifts in labor markets, and globalization impacts.
Which of the following economic challenges primarily characterized the U.S. economy in the early 21st century, particularly during the 2007-2008 financial crisis?