Question

Probably the most important Supreme Court decision was ______ in which the court ruled ______.

A)
McCulloch v. Maryland : the power to tax is the power to destroy
B)
Marbury v. Madison : that it had the power to declare a law unconstitutional
C)
Scott v Sandford : slaves are still slaves even when taken into free territories
D)
Fletcher v. Peck : that the national government has the right to regulate interstate commerce

Answer 1

In the case of Marbury v. Madison the Supreme Court ruled that it had the power to declare a law unconstitutional. Most scholars agree that this is the most crucial power of the Supreme Court. Without it, the Supreme Court is virtually insignificant.

Answer 2

I believe the correct answer from the choices listed above is option B. Probably the most important Supreme Court decision was Marbury v. Madison in which the court ruled that it had the power to declare a law unconstitutional.
Hope this answers the question. Have a nice day.