As Chief Justice of the United States Supreme Court, John Marshall:. a. was a strong Federalist and nationalist. b. supported a relatively broad interpretation of Federal power. c. delivered a series of the most momentous decisions in American judicial history. d. all of the above.

The good choice is:

b. supported a relatively broad interpretation of Federal power

Explanation:

Chief Justice John Marshall made a fundamental contribution to the role and prestige of the US Supreme Court. He is remembered for sentences that strengthened and expanded the powers of the federal government, as well as for enhancing constitutional jurisprudence by the Supreme Court in solving disputes over the competences of the branches of power.