When a Patent Is Successfully Defended in Court, the Cost

When a patent is successfully defended in court, the cost of the lawsuit

A) Should be expensed as incurred because it is a period cost.
B) Should be added to the cost of the patent and depreciated over the remaining useful life of the patent.
C) Should be added to the cost of the patent which is then expensed as a period cost.
D) Has already been expensed so there is no further action to take.