It demonstrated that even a president is subject to the law was significant about the decision made by the United States Supreme Court in United States v. Nixon.
Answer: Option A
Step-by-step explanation:
Between President Nixon and his competitor senator George McGovern, the presidential campaign took place during 1972 and resulted in the Watergate scandal. The historical United States Supreme Court case, which declared uniform decision against the President of U.S. Richard Nixon.
Thus, this case is also considered a turning-point by ceiling the power of any United States president if he asserts executive privilege(under certain circumstances having the privilege of maintaining confidential communications). Therefore, such an act by the supreme authority of law showcased that even a president is subject to the law.