With no explanation, chose the best option from "A", "B", "C" or "D". are the prices charged by suppliers like the BPA and the WAPA to the consumers like PG&E, through the CalPX and ISO. The Memphis clause binds the price charged to FERC determinations; the tariff binds the parties to use the CalPX and ISO for sale/purchase of energy; the parties, conducting sales through the CalPX and ISO to purchase/supply energy amongst themselves, are bound to each other through their market transactions, the rules of the tariff, and the FERC regulations. “When a contract provides that its terms are subject to a regulatory body, all parties to that contract are bound by the actions of the regulatory body.” Alliant Energy v. Neb. Pub. Power Dist., 347 F.3d 1046, 1050 (8th Cir. 2003). See Inter-City Gas Corp. v. Boise Cascade Corp., 845 F.2d 184, 187 (8th Cir. 1988) (<HOLDING>). The sellers and buyers of power achieved

A: holding that parties to a contract which provided that its rates may be approved ordered or set by any valid law order rule or regulation of any  regulatory authority  having jurisdiction were bound by a ferc rate determination even though they were not directly subject to fercs jurisdiction
B: recognizing that subject matter jurisdiction can be questioned at any time and with respect to any claim
C: holding issues related to subject matter jurisdiction may be raised at any time
D: holding that unlike subject matter jurisdiction personal jurisdiction may be waived
A.