With no explanation, chose the best option from "A", "B", "C" or "D". 76 S.Ct. 373, 100 L.Ed. 373 (1956), involved the Natural Gas Act, 15 U.S.C. §§ 717-717W (1976). “[T]he relevant provisions of [the Natural Gas Act] ‘are in all material respects substantially identical to the equivalent provisions of the’ Federal Power Act.” Appalachian Power Co. v. FPC, 174 U.S. App.D.C. 100, 102, 529 F.2d 342, 344 (1976) (quoting FPC v. Sierra Pac. Power Co., 350 U.S. 348, 353, 76 S.Ct. 368, 100 L.Ed. 1471 (1956)). 11 . See Hearings on H.R. 11662 Before a Sub-comm. of the House Comm, on Interstate and Foreign Commerce, 74th Cong., 2d Sess. 28-29 (1936) (noting private companies’ role in setting and effecting rates under earlier proposed version of the Natural Gas Act). See also Papago Tribal Util. Auth. v. FERC, 197 U.S.App. D.C. 395, 405, 610 F.2d 914, 924 (1979) (<HOLDING>); City of Oglesby v. FERC, No. 76-1585, slip.

A: recognizing exception under state constitution
B: recognizing exception
C: recognizing partyratemaking under  205d
D: recognizing such a claim under  1983
C.