What Is a "Contingent Asset

What is a "contingent asset?"

A) There is no such thing, in IASB standards, as a "contingent asset."
B) This is an asset that has been put up as collateral against a loan.
C) This is a possible inflow of resources arising from a future activity.
D) It is a probable asset, arising from past events, whose existence is yet to be confirmed definitively by a future event.