US GAAP if there is doubt about recovering a deferred tax asset.

问题如下：

Which of the following statements most accurately describes a valuation allowance for deferred taxes? A valuation allowance is required under:

选项：

A.both IFRS and US GAAP on deferred tax assets arising from the translation of foreign operations. B.US GAAP if there is doubt about recovering a deferred tax asset. C.IFRS on revaluation of a deferred tax asset.

解释：

A valuation allowance is required under US GAAP if there is doubt about whether a deferred tax asset will be recovered. Under IFRS, the deferred tax asset is written down directly.