Which of the Following Statements Regarding Nonqualified Stock Options (NQOs)

Which of the following statements regarding nonqualified stock options (NQOs) is false?

A) Book-tax differences associated with NQOs may be either permanent or temporary.
B) If the initial estimated value of the options that are exercised during the year is greater than the bargain element of those options, the book-tax difference for that year is unfavorable.
C) If the initial estimated value of the options that are exercised during the year is greater than the bargain element of those options, the book-tax difference for that year is entirely temporary.
D) None of the above (all of the above are true) .