The Fitzgeralds offer in writing to purchase a house for $120,000, including its draperies, with the offer to expire on Saturday at noon. The Wonderlies reply in writing on Thursday, accepting the $120,000 offer, but excluding the draperies. On Friday, while the Fitzgeralds consider this counteroffer, the Wonderlies decide to accept the original offer, draperies included, and state that in writing. At this point, the Fitzgeralds:
A. Must buy the house but may deduct the value of the draperies from the $120,000.
B. Are not bound to buy.
C. Are legally bound to buy the house although they have the right to insist that the draperies be included.
D. Must buy the house and are not entitled to the drapery