Max Begins to Perform,intending That the Completion of His Perform?ance

Multiple Choice

Max begins to perform,intending that the completion of his perform?ance act as an acceptance of Nia's offer,which can only be accepted by the com?pletion of the act.Nia can revoke her offer any time

A) after Nia makes it.
B) before Max completes performance of the act.
C) before Max has substantially begun performance of the act.
D) before Max indicates that he will perform.