Which of the following statements is true about a deferred tax liability according to GAAP?

A. It results from a past transaction and represents a future sacrifice but is not a present obligation.

B. It results from a past transaction, is a present obligation, and represents a future sacrifice.

C. It results from a past transaction and is a present obligation but does not represent a future sacrifice.

D. It is a present obligation and represents a future sacrifice, but does not result from a past transaction.