What was the effect of the supreme court case mcculloch v. maryland?
it local governments use direct democracy.
it denied states the right to control local governments.
it supported the strength of local governments over states.
it legitimized the power of the national government over states.
it showed how the national government’s power needs to be checked.

The correct answer is: "It legitimized the power of the national government over states".

McCulloch v. Maryland was a US Supreme Court case that led to the enactment of a landmark decision in 1819. It defined the powers of the US Congress, branch of the US federal government, in relation to powers at the state level.

The decision acknowledged the "necessary and proper clause", included in the US Constitution and which gives to the federal goverment certain implied powers which are not explicitly listed in the US Constitution. Moreover, it states that the federal goverment is supreme over state powers, so that the ability of the latter to interfere on the decisions of the first is limited.