Who can check Congress by announcing a law is unconstitutional? The A : judges
B:President
C: senators

A. Judges

Explanation:

Judges in the Supreme Court/other courts in the Judicial Branch can declare if laws passed by Congress are unconstitutional.

This is known as Judicial Review, which was established in the court case Marbury v. Madison.

So, these judges have the ability to check Congress by determining the constitutionality of their laws.

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explanation:

i think the answer's are a) b) and c)