Under the UCC Article 2,unless Otherwise Agreed,an Acceptance of an Offer

Under the UCC Article 2,unless otherwise agreed,an acceptance of an offer is effective:

A) When dispatched.
B) When dispatched,but only if the acceptance reaches its destination within a reasonable time.
C) When the acceptance is received.
D) When the goods are received.
E) When the offeree acknowledges receipt of the acceptance.