Mack's Bar Sent Olive Outlet an Order for 200 Cases

Multiple Choice

Mack's Bar sent Olive Outlet an order for 200 cases of olives,to be shipped "as soon as possible." The day Olive Outlet receives Mack's order,it ships the olives.Later that day,Mack phones the Outlet and tries to revoke his offer.Under these circumstances:

A) Mack cannot revoke,since a contract was created when Outlet shipped the olives.
B) Mack can revoke because the acceptance had not been received.
C) Mack can revoke based on principles of promissory estoppel.
D) Mark cannot revoke,since the olives will get spoilt if it is shipped back.