问题如下：
The buyer of an option has a contingent claim in the sense that the option creates:
选项：
A. a right.
B. an obligation.
C. a linear payoff with respect to gains and losses of the underlying.
解释：
A is correct. A contingent claim, a derivative in which the outcome or payoff depends on the outcome or payoff of an underlying asset, has come to be associated with a right, but not an obligation, to make a final payment contingent on the performance of the underlying.
B is incorrect because an option, as a contingent claim, grants the right but not the obligation to buy or sell the underlying at a later date.
C is incorrect because the holder of an option has a choice of whether to exercise the option. This choice creates a payoff that transforms the underlying payoff in a more pronounced manner than does a forward, futures, or swap, which provide linear payoffs. Options are different in that they limit losses in one direction.
B为什么不对呀 right 和obligation分别怎么理解
