Mayer Wrote Jackson and Offered to Sell Jackson a Building

Mayer wrote Jackson and offered to sell Jackson a building for $50,000. The offer stated it would expire 30 days from July 1, 2010. Mayer changed his mind and does not wish to be bound by his offer. If a legal dispute arises between the parties regarding whether there has been a valid acceptance of the offer, which of the following is correct?

A) The offer cannot be legally withdrawn for the stated period of time.
B) The offer will not expire prior to the 30 days even if Mayer sells the property to a third person and notifies Jackson.
C) If Jackson phoned Mayer on August 1 and accepted the offer, it would create a contract, provided he had no notice of the withdrawal of the offer.
D) If Jackson categorically rejects the offer on July 10, Jackson cannot validly accept within the remaining stated period of time.