Which of the Following Statements Is Not Correct

Which of the following statements is not correct?

A) The law requires Social Security to use its surpluses to purchase U.S. Government securities from the Treasury.
B) Public debt will finance most of the on-budget deficit during the next decade.
C) The Social Security surplus will finance most of the on-budget deficit during the next decade.
D) Foreign debt will finance the on-budget deficit during the next decade.