How Do IFRS and U

How do IFRS and U.S. GAAP differ in their approach to allowing reversals of inventory write-downs?

A) If they had not been previously recorded as separate assets by the acquired company, they should always be recorded as "Goodwill" on the balance sheet of the company acquiring them.
B) The cost of the intangibles should be expensed by the acquiring company on the merger date.
C) They should be recorded as separate intangible assets only if their useful life is indefinite.
D) IFRS requires the reversal of write-downs from cost to net realization value (NRV) when the selling price increases. U.S. GAAP prohibits the reversal of past write-downs.