Final answer:
The correct statement is (A) If the post-box rule applies, the acceptance is effective at the point of mailing.
Step-by-step explanation:
The correct statement with respect to the operation of the post-box rule is (A) If the post-box rule applies, the acceptance is effective at the point of mailing. The post-box rule, also known as the mailbox rule, is a common law principle that states that an acceptance sent by post is effective as soon as it is mailed, regardless of when it is received by the offeror. This means that once the acceptance is posted, it becomes binding on the parties, even if it gets lost or delayed in the mail.