Phil offers to sell Raina his rare Pokemon card collection. On Tuesday afternoon, Phil mailed revocation to Rhonda, who lives across the country. On Wednesday, before receiving revocation, Raina calls to accept. In this case -- Raina's acceptance is invalid because it came before revocation. Raina's acceptance is invalid because Phil's revocation is valid. O Raina rejected the offer, so the offer is terminated. Raina's acceptance is valid, and Phil's revocation is too late