On Thursday, Hank mails a letter to Lindsay rejecting the offer made to him, but wakes up Friday with a changed mind, and promptly mails a letter of acceptance to Lindsay. Which of the following is true?

The mailing of the rejection terminated the offer so Hank can no longer accept it.

b.

The letter of acceptance will be effective only if it is received by Lindsay before she receives the rejection.

c.

None of the above is true.

d.

The mailing of the acceptance letter immediately created a valid contract.