题目内容：
Currency options sold through an options exchange:
A.contain a commitment to the owner, and are standardized.
B.contain a commitment to the owner, and can be tailored to the desire of the owner.
C.contain a right but not a commitment to the owner, and can be tailored to the desire of the owner.
D.contain a right but not a commitment to the owner, and are standardized.
参考答案：