Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

The buyer of an option has a contingent claim in the sense that the option creates:
Option A:a right.
Option B:an obligation.
Option C:a linear payoff with respect to gains and losses of the underlying.

Answer: A