Which of the following statements regarding contingent liabilities is true?

A). If they are probable and estimable, then they must be recorded even before the outcome of the future event.
B). If they are probable and estimable, then they should be disclosed in the notes to the financial statements.
C). The accounting principle that determines whether a contingent liability is to be recorded is that of historical cost.
D). Contingencies that are not estimable should not be recorded or disclosed in the financial statements even if they are probable.