Which of the Following Book-Tax Basis Differences Results in a Deductible

Which of the following book-tax basis differences results in a deductible temporary difference?

A) Book basis of an employee post-retirement benefits liability exceeds its tax basis.
B) Book basis of a building exceeds the tax basis of the building.
C) Book basis of an acquired intangible exceeds the tax basis of the intangible.
D) Tax basis of a prepaid liability exceeds the book basis of the liability.