The correct answer is D) Chief Justice of the Supreme Court.
The President of the United States has six different roles. But the Chief Justice of the Supreme Court role does not belong to the President.
The official roles of the President are. 1.- Chief of the State. 2.- Chief Executive. 3.- Chief Diplomat. 4.- Commander-in-Chief. 5.- Legislative leader to veto laws derived from the Congress. 6.- Chief of its Party. The President of the U.S. is the main figure, the head of the state and is the leader of the executive branch.