What is recognizance? (Multiple Choice)

What is recognizance?
A) a party's acknowledgement in court that he or she will pay a specified sum of money if a certain event occurs
B) a sealed document that contains a formal contract whose contents are known to both parties and the referee who supervised its signing
C) a sealed document that contains an informal contract whose contents are known only to the parties
D) a party's acknowledgement in court that he or she is not liable to pay any money if a certain event occurs

This is for my business law class, anything will help