单选题 For all patties involved, which of the following financial instruments is NOT an example of a forward commitment?

A、

A. Swap.
B、

B. Call option.
C、

C. Futures contract.

【正确答案】 B

【答案解析】A call option is not binding on both parties in the same sense that the other financial instruments are. The call option gives the holder a right but does not impose an obligation.