Theta Foods Has a Promotion in Which a Customer Can

Theta Foods has a promotion in which a customer can send in 600 bar codes and receive an all-inclusive trip to Mexico,but the contest ends after only two weeks.Barry realizes that six-packs of pudding are individually coded and are on sale 2-for-$1,so the trip will cost only $300.He buys the pudding,but when he redeems it,Theta says because he did not inform them of his participation,he isn't eligible for the trip.Which of the following is true?

A) If Barry eats the pudding,he can get the trip.
B) Barry accepted the contract by performance.
C) Theta is correct;acceptance is required for a contract to be created.
D) Barry cannot show proof that he had the intention of accepting the offer.
E) Because of the postal rule,Barry accepted when he mailed the bar codes in.