Established as one of the three major branches of government in the United States by Article III of the U.S Constitution in 1789, the Supreme Court is considered the highest judicial court in the country and has the final word on cases where there is debate or uncertainty as to how the case must be ruled according to the laws established in the United States Constitution. In essence, the Supreme Court is the one who interprets the law in light of the U.S Constitution. Correct answer is A.