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D is corrent because an acceptance is considered to be effective when sent by the offeree as long as the acceptance was sent by a means specified in the offer or by the same means used to communicate the offer. However, the offeror may stipulate that acceptance is effective only when received by the offeror. Therefore, although Ard sent an acceptance on April 10, it would not become effective until the date it was received by Jet, April 14. In this situation, Jet’s revocation was received by Ard prior to the time that Ard’s acceptance reached Jet. Since a revocation is effective when received, Jet’s revocation effectively terminated its offer on April 12.
A is incorrect because although Ard sent an acceptance on April 10, the contract stated that an acceptance would not be effective until received. Jet received the acceptance on April 14, but this was after Ard received the telegram revoking the offer on April 12. Since a revocation is effective when received, the offer was effectively revoked on April 12, and no contract was formed.
B is incorrect because the contract stated that an acceptance would not be effective until received by Jet. Jet received the acceptance on April 14, not April 10.
C is incorrect because a revocation is effective when received. Ard received Jet’s revocation on April 12; thus, the offer was effectively terminated on this date.