Which of the Following Statements Is False About Teacher Salaries

Which of the following statements is false about teacher salaries?

A) After being adjusted for inflation, teacher salaries rose only 6.2% between 1997 and 2007.
B) The U.S. Census Bureau shows that the annual salary teachers receive has fallen sharply in relation to other workers with college degrees.
C) In 2010, public school teachers earned, on average, 20% less than workers in other professions that require similar levels of education and skills.
D) All are correct