The Rejection of an Offer

The rejection of an offer:

A) is effective when received by the offeror,and prevents the offeree from later accepting that offer
B) is effective when sent to the offeror,and prevents the offeree from later accepting that offer
C) is effective when received by the offeror,but does not prevent the offeree from later accepting that offer
D) is effective when sent to the offeror,but does not prevent the offeree from later accepting that offer