Ch of the following was the important precedent established by marbury v. madison of 1803?

No options attached but Marbury V. Madison established the notion of judicial review, that is, the idea that the courts reserve the right to review the actions of the Executive and Legislative Branch.

In Marbury, America's first political parties fought over an appointment. Ultimately, the appointment was inconsequential to history but John Marshall, the first Chief Justice of the Supreme Court, became famous in legal history for putting the Supreme Court into the fray and declaring that the Courts have  the power of "judicial review" or the power to review and invalidate actions of the other two federal branches of government.

me no say

quote is the answer your looking for.