16. In Marbury v.Madison, the Supreme Court established judicial review, which is a principle that would eventually be used by all courts to - strike down any law that the court deems unconstitutional decide the outcome of the contested election results mediate disputes related to commerce between states overturn any impeachment that the court deems unsupported by evidence

## Step 1<br />The problem is about the Marbury v. Madison case, a landmark case in the history of the United States Supreme Court. The case established the principle of judicial review, which is the power of the judiciary to review and determine the constitutionality of laws passed by the legislative and executive branches.<br /><br />## Step 2<br />The principle of judicial review allows the Supreme Court to invalidate laws that it deems unconstitutional. This means that the Supreme Court has the power to declare a law unconstitutional and therefore null and void.<br /><br />## Step 3<br />The other options provided in the problem, such as deciding the outcome of contested election results, mediating disputes related to commerce between states, or overturning any impeachment that the court deems unsupported by evidence, are not the primary functions of judicial review.