With no explanation, chose the best option from "A", "B", "C" or "D". also trickles down to particular agency officials: “When a statute delegates authority to a federal officer or agency, subdelegation to a subordinate federal officer or agency is presumptively permissible.” U.S. Telecom Ass’n v. FCC, 359 F.3d 554, 565 (D.C.Cir.2004). A necessary corollary to this principle is that the particular official acting on behalf of the agency must have been delegated the authority to act; otherwise such agency action is invalid. Ctr. for Auto Safety & Pub. Citizen, Inc. v. Nat’l Highway Traffic Safety Admin., 452 F.3d 798, 810 (D.C.Cir.2006); Flav-O-Rich, Inc. v. NLRB, 531 F.2d 358, 363 (6th Cir.1976); Pa. Mun. Auths. Ass’n v. Horinko, 292 F.Supp.2d 95, 104 (D.D.C.2003); see also Hazardous Waste Treatment Council v. Reilly, 938 F.2d 1390, 1394 (D.C.Cir.1991) (<HOLDING>). Thus, a court may uphold agency action only

A: holding that discretionary function can derive only from properly delegated authority
B: holding that agency action is final  and thus has legal effect  only if taken by officials possessing properly delegated authority
C: holding that chevron deference is due only when the agency acts pursuant to delegated authority
D: holding that chevron deference is due only when the agency acts pursuant to delegated authority and the agency action has the force of law
B.