When parties to an agreement use post for communication, the Postal Rule applies. Under this rule, A. an agreement is binding on the offeror when the offeror has posted the offer B. an agreement is binding on the offeree when the offeree has received the offer C.an agreement is binding on the offeror when the offeree has posted the acceptance D.an agreement is binding on the offeree when the offeree has posted the acceptance