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D is corrent. Generally, an offeror may revoke an offer at any time prior to acceptance by the offeree. However, notice of revocation must be received by the offeree before the revocation becomes effective. Since Carr’s telegram of acceptance was received by Mirk and became effective on May 16, per the terms of the offer, and Mirk did not receive the letter of revocation until May 17, acceptance occurred on May 16, and the letter of revocation was not effective.
A is incorrect. Notice of revocation must be received by the offeree before the revocation becomes effective.
B is incorrect. The offer stated that acceptance would only be effective upon receipt by the offeror.
C is incorrect. Generally an offeror can revoke an offer at any time prior to acceptance by the offeree.