During the current year, Mrs. Brown paid $15,000 for the demolition of a warehouse she was using in her business. At the time of the destruction, Mrs. Brown had an adjusted basis in the warehouse of $25,000 and a basis of $12,000 in the land where the warehouse stood. How should Mrs. Brown treat the cost of demolishing the warehouse for federal income tax purposes?

A. $15,000 business expense; $25,000 recognized loss.

B. $15,000 business expense; $25,000 addition to basis of land.

C. $40,000 business expense.

D. $40,000 addition to basis of land.