Deferred Tax Liability

Can someone please explain deferred tax liability, especially this one:

If timing differences that give rise to a deferred tax liability are not expected to reverse then the deferred tax:

A) must be reduced by a valuation allowance. B) should be considered an asset or liability. C) should be considered an increase in equity.

Your answer: A was incorrect. The correct answer was C) should be considered an increase in equity.

If deferred tax liabilities are expected to reverse in the future, then they should be classified as liabilities. If, however, they are not expected to reverse in the future, then they should be classified as equity.

Thanks in advance!!

I wrote an article that may help explain DTAs and DTLs: http://financialexamhelp123.com/dtas-and-dtls-how-to-keep-them-straight/

As for this question, all it’s saying is that if it’s unlikely that you’ll ever have to pay those taxes, then you shouldn’t treat them as a liability. The only alternative is to treat them as equity.