The Supreme Court serves what important function in the U.S. federal
 government?
 • A. It determines whether any actions by the executive and legislative
 branches are unconstitutional.
 B. It promotes the principle of limited government by consistently
 practicing judicial restraint.
 C. It ensures that all Americans receive a fair trial by accepting all
 cases submitted to it.
 D. It appoints all other federal judges to ensure consistent rulings at
 all levels.
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