d viability of "selective waiver" has concluded that it fails as inconsistent with the purpose of the attorney-client privilege. 13 EFTA00794289 Permian Coip. v. U.S., 665 F.2d 1214, 1221 (D.C. Cir. 1981). In addition, "[o]nce a party has disclosed work product to an adversary, it waives the work product