Which of the Following Statements About the Nullification Crisis of 1832

Which of the following statements about the nullification crisis of 1832 is FALSE?

A) The issue under discussion was the tariff, but the right of secession was also debated.
B) Andrew Jackson determined that the president had the right to use force to preserve the Union.
C) The nullification theory, according to Calhoun, gave the South a legal device to justify secession.
D) Jackson eventually backed down from the controversy and gave in completely to South Carolina's demands.