Answer:
The answer is: The posting rule or mailbox rule
Step-by-step 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.