A firm has just signed an 8-year lease on a new machine. Fair value of the machine is $100000.Lease payments are $18000 per year, payable at the end of the year. The machine has an estimated salvage value of $ 5000 at the end of the lease term. The machine has a 10-year useful life. The firm’s incremental borrowing cost is 8 percent. This lease should be classified as:（）
A. operating.
B. conventional.
C. capital.
