With no explanation, chose the best option from "A", "B", "C" or "D". or Revenue to the Ports of one State over those of another.” U.S. Const. art. I, § 9, cl. 6. These provisions have been narrowly construed to prohibit certain forms of direct discrimination between States within the legislative spheres to which the provisions apply: taxation and port-related commerce-and-revenue regulation,' respectively. See, e.g., United States v. Ptasynski, 462 U.S. 74, 85-86, 103 S.Ct. 2239, 2245-46, 76 L.Ed.2d 427 (1983) (upholding against a Uniformity Clause challenge an oil taxation scheme that had the effect of giving a unique exemption to Alaskan oil, on the grounds that the exemption was based on “neutral factors” and was not intentionally discriminatory); Pennsylvania v. Wheeling & Belmont Bridge Co., 59 U.S. (18 How.) 421, 433-35, 15 L.Ed. 435 (1855) (<HOLDING>). Nevada correctly notes that the Supreme Court

A: holding that congress may not direct a state to enact or enforce a particular law or type of law
B: holding that the port preference clause prohibits only positive legislation by congress that gives a direct privilege or preference to the ports of any particular state over those of another not federal enactments that merely confer incidental advantages on one port over others
C: holding over
D: recognizing that the bill of attainder prohibits punitive legislation
B.