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.

In contrast to contingent claims, forward contracts:
Option A:have their prices chosen by the participants.
Option B:could end in default by either party.
Option C:can be exercised by physical or cash delivery.

Answer: B