To Be Effective,notice of Revocation of an Offer

Multiple Choice

To be effective,notice of revocation of an offer:

A) must be communicated directly to the offeree before the offeree has accepted.
B) may be communicated indirectly to the offeree through a third person.
C) must be dispatched before the offeree accepts;when notice actually reaches the offeree is not important.
D) is not addressed in the Restatement.