How did the decision in Marbury v. Madison (1803) strengthen the power of the Supreme Court?
A. It denied state courts the authority to override federal precedent
B. It asserted that the Court could order the president to carry out a law
C. It intervened in a conflict between the other two branches of government
D. It established the Court's right to declare an act of Congress unconstitutional
The Supreme Court can disallow a law on the grounds that it was unconstitutional thus establishing the of judicial review and the authority of Supreme Court as the watchdog of the constitution.