Answer:
B. $9 million
Explanation:
firstly we are given a book value of the plant assets which is $60 million which in calculating the depreciation we use straight line method which is using the assets book value to depreciate over the assets lifespan which is 20 years so to calculate the depreciation for 1 year = $60 million/ 20 years= $3 million which is the depreciation for one year then we multiply this amount for 3 years which will be $3 million X 3years= $9 million which needs to be adjusted and the plant assets must be revalued by in order to have the correct fair value of the plant assets.