This question tests the shift in federal power from the Articles of Confederation to the Constitution. Under the Articles, the national government was weak: Congress could request money and handle war or diplomacy, but it could not compel states to pay taxes or regulate trade, leaving the national government with little ability to enforce its laws. The Constitution changes that by establishing a stronger federal framework with power vested in the national government to levy taxes, regulate interstate and foreign commerce, and enforce laws across the states. This combination creates a more capable central authority that can raise revenue, manage trade, and ensure compliance with national standards, addressing the major weaknesses of the Articles. The other statements don’t fit because the Constitution did not keep the same powers as the Articles, it did not abolish state sovereignty entirely—states retained significant authority within a stronger national system—and it introduced substantial governance changes, including a federal framework with enforceable laws and separate branches.

The plan’s main idea was to create a strong national government with a bicameral legislature whose seats would be allocated based on a state’s population or wealth. That proportional representation would give larger states more influence in making laws, a key feature distinguishing it from plans that favored equal representation. While it also proposed an executive and a judiciary, the essential point for this question is the two-house structure tied to population or wealth. This is why the correct description is a two-house legislature with representation according to population or wealth. The other options don’t match this core feature—the Virginia Plan wasn’t about one house with equal representation or about judicial supremacy.

Supremacy of the Constitution. The Constitution is the highest legal authority in the United States, establishing how the government is organized, how powers are distributed, and what limits apply to those powers. The Supremacy Clause ties this authority together by declaring that the Constitution, and laws made under it, are the supreme law of the land, binding on both federal and state governments. The other options aren’t the ultimate law: the Declaration of Independence is a principled statement, not a binding legal framework; the Articles of Confederation was an earlier, weaker system replaced by the Constitution; and while the Bill of Rights protects fundamental rights, it is part of the Constitution, not the standalone supreme law. So the Constitution is the supreme law of the land.

The main idea is how the Constitution would come into effect: it needed a substantial degree of support from the states, not every state, to show legitimacy and broad consensus. Requiring nine ratifications meant the new framework had enough backing across different regions and factions to be considered legitimate, while not being held up by one or two reluctant states. Delaware was the first to ratify, doing so on December 7, 1787, which helped momentum build for others to follow. The other options don’t fit because the threshold wasn’t about geographic balance or unanimous consent, and the first ratifying state was Delaware, not Pennsylvania or New York.