John marshall was a leader of which instrument of government? a) the senate b) the presidency c) the supreme court d) the house of representatives

D.The supreme court.
 
He was the fourth chief justice in US supreme.

C (The Supreme Court)
Explanation: John Marshall became the fourth chief justice of the U.S. Supreme Court in 1801. He is largely responsible for establishing the Supreme Court's role in federal government.
~Deceptiøn