单选题 Timely Taxis, Ltd. has signed a long-term lease for 20 underground parking spots at $150 each per month for their fleet of taxis. The firm currently has 18 taxis in operation and is performing an NPV analysis on the purchase of a 19th taxi. The cost of parking for the 19th taxi is best described as a(n):

A、

A. sunk cost.
B、

B. opportunity cost.
C、

C. incremental cost.

【正确答案】 A

【答案解析】The 19th space is neither an incremental cost, nor an opportunity cost or a type of cannibalization. It is a sunk cost since the firm has already committed to parking for 20 taxis. The cost of the 19th parking space is not directly relevant to the capital budgeting decision.