Which of the Following Items Is Not a Temporary Difference

Which of the following items is not a temporary difference?

A) A goodwill impairment expense is recorded on the income statement; the goodwill did not have a tax basis when it was created.
B) Tax depreciation for the period exceeds book depreciation.
C) Bad debts charged off in the current period exceed the bad debts accrued in the current period.
D) Vacation pay accrued for tax purposes in a prior period is deducted in the current period.