What Does an Injured Plaintiff Need to Prove to a Court

What does an injured plaintiff need to prove to a court in order to claim duress?

A) Plaintiff must claim that they were threatened with physical violence.
B) Plaintiff must demonstrate that the threat left no reasonable alternatives and that the free will necessary for legal consent was removed by the specifics of the threat.
C) Plaintiff's duress claim must have an associated monetary value in order for a claim to be considered by a court.
D) Plaintiff must prove that there was no prior contractual arrangement between the parties.
E) Plaintiff only need show there was some ascertainable harm that would happen in the future.