4. When a company purchases land with a building on it and immediately tears down the building so that the land can be used for the construction of a plant, the costs incurred to tear down the building should be: (a) Added to the cost of the plant. (b) Amortized over the estimated time period between the tearing dowrn (c) (d) of the building and the completion of the plant. Expensed as incurred. Added to the cost of the land