Answer:
a- Total Assets
Explanation:
Impairment write downs are not cash related events but an accounting entry made to reduce the carrying amount when Carrying Amount of an Asset is found to be greater than the Recoverable Value of the Asset.
Carrying Amount of an Asset is Cost less Accumulated depreciation of an asset. While the Recoverable Value of the Asset is the higher of Fair Value and Value in use of an asset.
Therefore, only Total Assets decrease as a result of impairment of Goodwill.