A line graph titled Unemployment Percentages and Levels of Education where the x-axis shows dates from November 2007 to November 2010 and the y-axis shows the percentage unemployed. No High School diploma starts at 7.5 percent in November 2007, rises steadily to 15 percent in November 2009, and stays at 15 percent to November 2010. High School diploma starts at 4.8 percent, rises steadily to 10.5 percent in November 2009, and falls to 9.5 percent in November 2010. Some college starts at 4 percent in November 2007, rises to 9 percent in November 2009, and falls to 8 percent in November 2010. Bachelor's degree or higher starts at 2 percent, rises to 5 percent in November 2009, and slowly falls to 4.9 percent in November 2010. Based on the above graph, what was the percentage of difference between someone without a high school diploma and someone who has completed some college in November 2009?
A.4%
B.5%
C.7%
D.10%