The provides that an acceptance of an offer takes effect at the time it is communicated via the mode expressly or impliedly authorized by the offeror, rather than at the time it is actually received by the offeror.

The answer is: The posting rule or mailbox rule

Explanation:

The posting rule, also known as the mailbox rule, is a rule or principle that determines the time of the accepted offer. The offeror is the individual who offers and the person who accepts the offer is called offeree.

According to this rule, the acceptance takes effect, when the offeree communicates the acceptance of the offer by mail or any other delivery service.

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