During the Moot, When Is It Permissible to Speak to Your

During the moot, when is it permissible to speak to your mooting partner?

A) Never.
B) When the opposing team is speaking to the judge, provided that you do so quietly and do not interrupt them.
C) Prior to answering a question from the judge, provided that he or she has given you permission to do so.
D) During your partner's submissions, if you feel that he or she needs some help or is presenting the law in a way that misleads the judge.