Why were the decisions of the Supreme Court in Gibbons v. Ogden and McCulloch v. Maryland important?

a
They expanded the power of the legislative branch over the judicial branch.
b
They created the framework of a national banking system.
c
They gave state governments control over interstate trade.
d
They strengthened the power of the federal government over states.

d. They strengthened the power of the federal government over states.

The decisions in Gibbons v. Ogden and McCulloch v. Maryland were important because they upheld the supremacy of federal laws over state laws and established the principle of implied powers for the federal government. These decisions helped to strengthen the power of the federal government over the states and ensure a more unified and cohesive nation.