What was the significance of McCulloch v. Maryland?

The case identified federal authority over interstate commerce.
The case identified the procedures for the Supreme Court to review federal legislation.
The case overturned the notion of “separate but equal.”
The case established a method for interpreting the Constitution.

I know it is not a or c. I think it's D?

Yes, it's d.

You are correct, the significance of McCulloch v. Maryland is that it established a method for interpreting the Constitution.

To find the answer to this question, you can start by analyzing the options provided. In this case, option A is incorrect because McCulloch v. Maryland did not specifically focus on federal authority over interstate commerce. Option C is also incorrect because the case did not involve the concept of "separate but equal" which was addressed in the later case of Plessy v. Ferguson.

Now, let's examine option B. McCulloch v. Maryland did not address the procedures for the Supreme Court to review federal legislation. The case primarily centered around the issue of the constitutionality of the Second Bank of the United States.

This leaves us with option D, which states that the significance of McCulloch v. Maryland is that it established a method for interpreting the Constitution. This is indeed the correct answer. The case is well-known for Chief Justice John Marshall's opinion, which set the precedent of using implied powers to interpret the Constitution and expand the powers of the federal government.

Therefore, the correct answer is option D.