The graph shows US involvement in Afghanistan from 2001 to 2011. A graph titled American Troops Deployed to Afghanistan shows Years from 2001 to 2011 on the x axis and number deployed on the y axis. From 2001 to 2003, below 10,000. From 2003 to 2008, rising steadily to 30,000, increasing to 60,000 in 2009, 100,000 in 2010, decreasing to under 90,000 in 2011.

What does the graph reveal about American involvement in Afghanistan that may have been unanticipated in 2001?

the ease with which the Taliban was permanently defeated
the American public’s lack of support for the war
the duration of America’s participation in the war
the lack of support for the war effort from US allies